source: trunk/src/comctl32/comctl32undoc.c@ 10097

/*
 * Undocumented functions from COMCTL32.DLL
 *
 * Copyright 1998 Eric Kohl
 *           1998 Juergen Schmied <j.schmied@metronet.de>
 *           2000 Eric Kohl for CodeWeavers
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * NOTES
 *     All of these functions are UNDOCUMENTED!! And I mean UNDOCUMENTED!!!!
 *     Do NOT rely on names or contents of undocumented structures and types!!!
 *     These functions are used by EXPLORER.EXE, IEXPLORE.EXE and
 *     COMCTL32.DLL (internally).
 *
 * TODO
 *     - Add more functions.
 *     - Write some documentation.
 */
#ifdef __WIN32OS2__
#define WINE_LARGE_INTEGER
#endif

#include "config.h"
#include "wine/port.h"

#include <string.h>
#include <stdlib.h> /* atoi */
#include <ctype.h>
#include <limits.h>

#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "commctrl.h"
#include "objbase.h"
#include "winbase.h"
#include "winerror.h"
#include "winreg.h"

#include "wine/unicode.h"
#include "comctl32.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(commctrl);


extern HANDLE COMCTL32_hHeap; /* handle to the private heap */


typedef struct _STREAMDATA
{
    DWORD dwSize;
    DWORD dwData2;
    DWORD dwItems;
} STREAMDATA, *PSTREAMDATA;

typedef struct _LOADDATA
{
    INT   nCount;
    PVOID ptr;
} LOADDATA, *LPLOADDATA;

#ifdef __WIN32OS2__
typedef HRESULT (* CALLBACK DPALOADPROC)(LPLOADDATA,IStream*,LPARAM);
#else
typedef HRESULT (CALLBACK *DPALOADPROC)(LPLOADDATA,IStream*,LPARAM);
#endif

/**************************************************************************
 * DPA_LoadStream [COMCTL32.9]
 *
 * Loads a dynamic pointer array from a stream
 *
 * PARAMS
 *     phDpa    [O] pointer to a handle to a dynamic pointer array
 *     loadProc [I] pointer to a callback function
 *     pStream  [I] pointer to a stream
 *     lParam   [I] application specific value
 *
 * NOTES
 *     No more information available yet!
 */

HRESULT WINAPI
DPA_LoadStream (HDPA *phDpa, DPALOADPROC loadProc, IStream *pStream, LPARAM lParam)
{
    HRESULT errCode;
    LARGE_INTEGER position;
    ULARGE_INTEGER newPosition;
    STREAMDATA  streamData;
    LOADDATA loadData;
    ULONG ulRead;
    HDPA hDpa;
    PVOID *ptr;

    FIXME ("phDpa=%p loadProc=%p pStream=%p lParam=%lx\n",
           phDpa, loadProc, pStream, lParam);

    if (!phDpa || !loadProc || !pStream)
        return E_INVALIDARG;

    *phDpa = (HDPA)NULL;

    position.s.LowPart = 0;
    position.s.HighPart = 0;

    /*
     * Zero out our streamData
     */
    memset(&streamData,0,sizeof(STREAMDATA));

    errCode = IStream_Seek (pStream, position, STREAM_SEEK_CUR, &newPosition);
    if (errCode != S_OK)
        return errCode;

    errCode = IStream_Read (pStream, &streamData, sizeof(STREAMDATA), &ulRead);
    if (errCode != S_OK)
        return errCode;

    FIXME ("dwSize=%lu dwData2=%lu dwItems=%lu\n",
           streamData.dwSize, streamData.dwData2, streamData.dwItems);

    if ( ulRead < sizeof(STREAMDATA) ||
    lParam < sizeof(STREAMDATA) ||
        streamData.dwSize < sizeof(STREAMDATA) ||
        streamData.dwData2 < 1) {
        errCode = E_FAIL;
    }

    if (streamData.dwItems > (UINT_MAX / 2 / sizeof(VOID*))) /* 536870911 */
        return E_OUTOFMEMORY;

    /* create the dpa */
    hDpa = DPA_Create (streamData.dwItems);
    if (!hDpa)
        return E_OUTOFMEMORY;

    if (!DPA_Grow (hDpa, streamData.dwItems))
        return E_OUTOFMEMORY;

    /* load data from the stream into the dpa */
    ptr = hDpa->ptrs;
    for (loadData.nCount = 0; loadData.nCount < streamData.dwItems; loadData.nCount++) {
        errCode = (loadProc)(&loadData, pStream, lParam);
        if (errCode != S_OK) {
            errCode = S_FALSE;
            break;
        }

        *ptr = loadData.ptr;
        ptr++;
    }

    /* set the number of items */
    hDpa->nItemCount = loadData.nCount;

    /* store the handle to the dpa */
    *phDpa = hDpa;
    FIXME ("new hDpa=%p\n", hDpa);

    return errCode;
}


/**************************************************************************
 * DPA_SaveStream [COMCTL32.10]
 *
 * Saves a dynamic pointer array to a stream
 *
 * PARAMS
 *     hDpa     [I] handle to a dynamic pointer array
 *     loadProc [I] pointer to a callback function
 *     pStream  [I] pointer to a stream
 *     lParam   [I] application specific value
 *
 * NOTES
 *     No more information available yet!
 */

HRESULT WINAPI
DPA_SaveStream (const HDPA hDpa, DPALOADPROC loadProc, IStream *pStream, LPARAM lParam)
{

    FIXME ("hDpa=%p loadProc=%p pStream=%p lParam=%lx\n",
           hDpa, loadProc, pStream, lParam);

    return E_FAIL;
}


/**************************************************************************
 * DPA_Merge [COMCTL32.11]
 *
 * PARAMS
 *     hdpa1       [I] handle to a dynamic pointer array
 *     hdpa2       [I] handle to a dynamic pointer array
 *     dwFlags     [I] flags
 *     pfnCompare  [I] pointer to sort function
 *     pfnMerge    [I] pointer to merge function
 *     lParam      [I] application specific value
 *
 * NOTES
 *     No more information available yet!
 */

BOOL WINAPI
DPA_Merge (const HDPA hdpa1, const HDPA hdpa2, DWORD dwFlags,
           PFNDPACOMPARE pfnCompare, PFNDPAMERGE pfnMerge, LPARAM lParam)
{
    INT nCount;
    LPVOID *pWork1, *pWork2;
    INT nResult, i;
    INT nIndex;

    TRACE("%p %p %08lx %p %p %08lx)\n",
           hdpa1, hdpa2, dwFlags, pfnCompare, pfnMerge, lParam);

    if (IsBadWritePtr (hdpa1, sizeof(DPA)))
        return FALSE;

    if (IsBadWritePtr (hdpa2, sizeof(DPA)))
        return FALSE;

    if (IsBadCodePtr ((FARPROC)pfnCompare))
        return FALSE;

    if (IsBadCodePtr ((FARPROC)pfnMerge))
        return FALSE;

    if (!(dwFlags & DPAM_NOSORT)) {
        TRACE("sorting dpa's!\n");
        if (hdpa1->nItemCount > 0)
        DPA_Sort (hdpa1, pfnCompare, lParam);
        TRACE ("dpa 1 sorted!\n");
        if (hdpa2->nItemCount > 0)
        DPA_Sort (hdpa2, pfnCompare, lParam);
        TRACE ("dpa 2 sorted!\n");
    }

    if (hdpa2->nItemCount < 1)
        return TRUE;

    TRACE("hdpa1->nItemCount=%d hdpa2->nItemCount=%d\n",
           hdpa1->nItemCount, hdpa2->nItemCount);


    /* working but untrusted implementation */

    pWork1 = &(hdpa1->ptrs[hdpa1->nItemCount - 1]);
    pWork2 = &(hdpa2->ptrs[hdpa2->nItemCount - 1]);

    nIndex = hdpa1->nItemCount - 1;
    nCount = hdpa2->nItemCount - 1;

    do
    {
        if (nIndex < 0) {
            if ((nCount >= 0) && (dwFlags & DPAM_INSERT)) {
                /* Now insert the remaining new items into DPA 1 */
                TRACE("%d items to be inserted at start of DPA 1\n",
                      nCount+1);
                for (i=nCount; i>=0; i--) {
                    PVOID ptr;

                    ptr = (pfnMerge)(3, *pWork2, NULL, lParam);
                    if (!ptr)
                        return FALSE;
                    DPA_InsertPtr (hdpa1, 0, ptr);
                    pWork2--;
                }
            }
            break;
        }
        nResult = (pfnCompare)(*pWork1, *pWork2, lParam);
        TRACE("compare result=%d, dpa1.cnt=%d, dpa2.cnt=%d\n",
              nResult, nIndex, nCount);

        if (nResult == 0)
        {
            PVOID ptr;

            ptr = (pfnMerge)(1, *pWork1, *pWork2, lParam);
            if (!ptr)
                return FALSE;

            nCount--;
            pWork2--;
            *pWork1 = ptr;
            nIndex--;
            pWork1--;
        }
        else if (nResult > 0)
        {
            /* item in DPA 1 missing from DPA 2 */
            if (dwFlags & DPAM_DELETE)
            {
                /* Now delete the extra item in DPA1 */
                PVOID ptr;

                ptr = DPA_DeletePtr (hdpa1, hdpa1->nItemCount - 1);

                (pfnMerge)(2, ptr, NULL, lParam);
            }
            nIndex--;
            pWork1--;
        }
        else
        {
            /* new item in DPA 2 */
            if (dwFlags & DPAM_INSERT)
            {
                /* Now insert the new item in DPA 1 */
                PVOID ptr;

                ptr = (pfnMerge)(3, *pWork2, NULL, lParam);
                if (!ptr)
                    return FALSE;
                DPA_InsertPtr (hdpa1, nIndex+1, ptr);
            }
            nCount--;
            pWork2--;
        }

    }
    while (nCount >= 0);

    return TRUE;
}


/**************************************************************************
 * Alloc [COMCTL32.71]
 *
 * Allocates memory block from the dll's private heap
 *
 * PARAMS
 *     dwSize [I] size of the allocated memory block
 *
 * RETURNS
 *     Success: pointer to allocated memory block
 *     Failure: NULL
 */

LPVOID WINAPI
COMCTL32_Alloc (DWORD dwSize)
{
    LPVOID lpPtr;

    TRACE("(0x%lx)\n", dwSize);

    lpPtr = HeapAlloc (COMCTL32_hHeap, HEAP_ZERO_MEMORY, dwSize);

    TRACE("-- ret=%p\n", lpPtr);

    return lpPtr;
}


/**************************************************************************
 * ReAlloc [COMCTL32.72]
 *
 * Changes the size of an allocated memory block or allocates a memory
 * block using the dll's private heap.
 *
 * PARAMS
 *     lpSrc  [I] pointer to memory block which will be resized
 *     dwSize [I] new size of the memory block.
 *
 * RETURNS
 *     Success: pointer to the resized memory block
 *     Failure: NULL
 *
 * NOTES
 *     If lpSrc is a NULL-pointer, then COMCTL32_ReAlloc allocates a memory
 *     block like COMCTL32_Alloc.
 */

LPVOID WINAPI
COMCTL32_ReAlloc (LPVOID lpSrc, DWORD dwSize)
{
    LPVOID lpDest;

    TRACE("(%p 0x%08lx)\n", lpSrc, dwSize);

    if (lpSrc)
        lpDest = HeapReAlloc (COMCTL32_hHeap, HEAP_ZERO_MEMORY, lpSrc, dwSize);
    else
        lpDest = HeapAlloc (COMCTL32_hHeap, HEAP_ZERO_MEMORY, dwSize);

    TRACE("-- ret=%p\n", lpDest);

    return lpDest;
}


/**************************************************************************
 * Free [COMCTL32.73]
 *
 * Frees an allocated memory block from the dll's private heap.
 *
 * PARAMS
 *     lpMem [I] pointer to memory block which will be freed
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
COMCTL32_Free (LPVOID lpMem)
{
    TRACE("(%p)\n", lpMem);

    return HeapFree (COMCTL32_hHeap, 0, lpMem);
}


/**************************************************************************
 * GetSize [COMCTL32.74]
 *
 * Retrieves the size of the specified memory block from the dll's
 * private heap.
 *
 * PARAMS
 *     lpMem [I] pointer to an allocated memory block
 *
 * RETURNS
 *     Success: size of the specified memory block
 *     Failure: 0
 */

DWORD WINAPI
COMCTL32_GetSize (LPVOID lpMem)
{
    TRACE("(%p)\n", lpMem);

    return HeapSize (COMCTL32_hHeap, 0, lpMem);
}


/**************************************************************************
 * The MRU-API is a set of functions to manipulate MRU(Most Recently Used)
 * lists.
 *
 * Stored in the reg. as a set of values under a single key.  Each item in the
 * list has a value name that is a single char. 'a' - 'z', '{', '|' or '}'.
 * The order of the list is stored with value name 'MRUList' which is a string
 * containing the value names (i.e. 'a', 'b', etc.) in the relevant order.
 */

typedef struct tagCREATEMRULISTA
{
    DWORD  cbSize;        /* size of struct */
    DWORD  nMaxItems;     /* max no. of items in list */
    DWORD  dwFlags;       /* see below */
    HKEY   hKey;          /* root reg. key under which list is saved */
    LPCSTR lpszSubKey;    /* reg. subkey */
    PROC   lpfnCompare;   /* item compare proc */
} CREATEMRULISTA, *LPCREATEMRULISTA;

typedef struct tagCREATEMRULISTW
{
    DWORD   cbSize;        /* size of struct */
    DWORD   nMaxItems;     /* max no. of items in list */
    DWORD   dwFlags;       /* see below */
    HKEY    hKey;          /* root reg. key under which list is saved */
    LPCWSTR lpszSubKey;    /* reg. subkey */
    PROC    lpfnCompare;   /* item compare proc */
} CREATEMRULISTW, *LPCREATEMRULISTW;

/* dwFlags */
#define MRUF_STRING_LIST  0 /* list will contain strings */
#define MRUF_BINARY_LIST  1 /* list will contain binary data */
#define MRUF_DELAYED_SAVE 2 /* only save list order to reg. is FreeMRUList */

/* If list is a string list lpfnCompare has the following prototype
 * int CALLBACK MRUCompareString(LPCSTR s1, LPCSTR s2)
 * for binary lists the prototype is
 * int CALLBACK MRUCompareBinary(LPCVOID data1, LPCVOID data2, DWORD cbData)
 * where cbData is the no. of bytes to compare.
 * Need to check what return value means identical - 0?
 */

typedef struct tagWINEMRUITEM
{
    DWORD          size;        /* size of data stored               */
    DWORD          itemFlag;    /* flags                             */
    BYTE           datastart;
} WINEMRUITEM, *LPWINEMRUITEM;

/* itemFlag */
#define WMRUIF_CHANGED   0x0001 /* this dataitem changed             */

typedef struct tagWINEMRULIST
{
    CREATEMRULISTW extview;     /* original create information       */
    BOOL           isUnicode;   /* is compare fn Unicode */
    DWORD          wineFlags;   /* internal flags                    */
    DWORD          cursize;     /* current size of realMRU           */
    LPSTR          realMRU;     /* pointer to string of index names  */
    LPWINEMRUITEM  *array;      /* array of pointers to data         */
                                /* in 'a' to 'z' order               */
} WINEMRULIST, *LPWINEMRULIST;

/* wineFlags */
#define WMRUF_CHANGED  0x0001   /* MRU list has changed              */

/**************************************************************************
 *              MRU_SaveChanged - Localize MRU saving code
 *
 */
VOID MRU_SaveChanged( LPWINEMRULIST mp )
{
    UINT i, err;
    HKEY newkey;
    WCHAR realname[2];
    LPWINEMRUITEM witem;
    WCHAR emptyW[] = {'\0'};

    /* or should we do the following instead of RegOpenKeyEx:
     */

    /* open the sub key */
    if ((err = RegOpenKeyExW( mp->extview.hKey, mp->extview.lpszSubKey,
                              0, KEY_WRITE, &newkey))) {
        /* not present - what to do ??? */
        ERR("Can not open key, error=%d, attempting to create\n",
            err);
        if ((err = RegCreateKeyExW( mp->extview.hKey, mp->extview.lpszSubKey,
                                    0,
                                    emptyW,
                                    REG_OPTION_NON_VOLATILE,
                                    KEY_READ | KEY_WRITE,
                                    0,
                                    &newkey,
                                    0))) {
            ERR("failed to create key /%s/, err=%d\n",
                debugstr_w(mp->extview.lpszSubKey), err);
            return;
        }
    }
    if (mp->wineFlags & WMRUF_CHANGED) {
        mp->wineFlags &= ~WMRUF_CHANGED;
        err = RegSetValueExA(newkey, "MRUList", 0, REG_SZ,
                             mp->realMRU, strlen(mp->realMRU) + 1);
        if (err) {
            ERR("error saving MRUList, err=%d\n", err);
        }
        TRACE("saving MRUList=/%s/\n", mp->realMRU);
    }
    realname[1] = 0;
    for(i=0; i<mp->cursize; i++) {
        witem = mp->array[i];
        if (witem->itemFlag & WMRUIF_CHANGED) {
            witem->itemFlag &= ~WMRUIF_CHANGED;
            realname[0] = 'a' + i;
            err = RegSetValueExW(newkey, realname, 0,
                                 (mp->extview.dwFlags & MRUF_BINARY_LIST) ?
                                 REG_BINARY : REG_SZ,
                                 &witem->datastart, witem->size);
            if (err) {
                ERR("error saving /%s/, err=%d\n", debugstr_w(realname), err);
            }
            TRACE("saving value for name /%s/ size=%ld\n",
                  debugstr_w(realname), witem->size);
        }
    }
    RegCloseKey( newkey );
}

/**************************************************************************
 *              FreeMRUList [COMCTL32.152]
 *
 * PARAMS
 *     hMRUList [I] Handle to list.
 *
 */
DWORD WINAPI
FreeMRUList (HANDLE hMRUList)
{
    LPWINEMRULIST mp = (LPWINEMRULIST)hMRUList;
    UINT i;

    TRACE("\n");
    if (mp->wineFlags & WMRUF_CHANGED) {
        /* need to open key and then save the info */
        MRU_SaveChanged( mp );
    }

    for(i=0; i<mp->extview.nMaxItems; i++) {
        if (mp->array[i])
            COMCTL32_Free(mp->array[i]);
    }
    COMCTL32_Free(mp->realMRU);
    COMCTL32_Free(mp->array);
    COMCTL32_Free((LPWSTR)mp->extview.lpszSubKey);
    return COMCTL32_Free(mp);
}


/**************************************************************************
 *                  FindMRUData [COMCTL32.169]
 *
 * Searches binary list for item that matches lpData of length cbData.
 * Returns position in list order 0 -> MRU and if lpRegNum != NULL then value
 * corresponding to item's reg. name will be stored in it ('a' -> 0).
 *
 * PARAMS
 *    hList [I] list handle
 *    lpData [I] data to find
 *    cbData [I] length of data
 *    lpRegNum [O] position in registry (maybe NULL)
 *
 * RETURNS
 *    Position in list 0 -> MRU.  -1 if item not found.
 */
INT WINAPI
FindMRUData (HANDLE hList, LPCVOID lpData, DWORD cbData, LPINT lpRegNum)
{
    LPWINEMRULIST mp = (LPWINEMRULIST)hList;
    UINT i, ret;
    LPSTR dataA = NULL;

    if (!mp->extview.lpfnCompare) {
        ERR("MRU list not properly created. No compare procedure.\n");
        return -1;
    }

    if(!(mp->extview.dwFlags & MRUF_BINARY_LIST) && !mp->isUnicode) {
        DWORD len = WideCharToMultiByte(CP_ACP, 0, lpData, -1,
                                        NULL, 0, NULL, NULL);
        dataA = COMCTL32_Alloc(len);
        WideCharToMultiByte(CP_ACP, 0, lpData, -1, dataA, len, NULL, NULL);
    }

    for(i=0; i<mp->cursize; i++) {
        if (mp->extview.dwFlags & MRUF_BINARY_LIST) {
            if (!mp->extview.lpfnCompare(lpData, &mp->array[i]->datastart,
                                         cbData))
                break;
        }
        else {
            if(mp->isUnicode) {
                if (!mp->extview.lpfnCompare(lpData, &mp->array[i]->datastart))
                    break;
            } else {
                DWORD len = WideCharToMultiByte(CP_ACP, 0,
                                                (LPWSTR)&mp->array[i]->datastart, -1,
                                                NULL, 0, NULL, NULL);
                LPSTR itemA = COMCTL32_Alloc(len);
                INT cmp;
                WideCharToMultiByte(CP_ACP, 0, (LPWSTR)&mp->array[i]->datastart, -1,
                                    itemA, len, NULL, NULL);

                cmp = mp->extview.lpfnCompare(dataA, itemA);
                COMCTL32_Free(itemA);
                if(!cmp)
                    break;
            }
        }
    }
    if(dataA)
        COMCTL32_Free(dataA);
    if (i < mp->cursize)
        ret = i;
    else
        ret = -1;
    if (lpRegNum && (ret != -1))
        *lpRegNum = 'a' + i;

    TRACE("(%p, %p, %ld, %p) returning %d\n",
           hList, lpData, cbData, lpRegNum, ret);

    return ret;
}


/**************************************************************************
 *              AddMRUData [COMCTL32.167]
 *
 * Add item to MRU binary list.  If item already exists in list then it is
 * simply moved up to the top of the list and not added again.  If list is
 * full then the least recently used item is removed to make room.
 *
 * PARAMS
 *     hList [I] Handle to list.
 *     lpData [I] ptr to data to add.
 *     cbData [I] no. of bytes of data.
 *
 * RETURNS
 *     No. corresponding to registry name where value is stored 'a' -> 0 etc.
 *     -1 on error.
 */
INT WINAPI
AddMRUData (HANDLE hList, LPCVOID lpData, DWORD cbData)
{
    LPWINEMRULIST mp = (LPWINEMRULIST)hList;
    LPWINEMRUITEM witem;
    INT i, replace, ret;

    if ((replace = FindMRUData (hList, lpData, cbData, NULL)) < 0) {
        /* either add a new entry or replace oldest */
        if (mp->cursize < mp->extview.nMaxItems) {
            /* Add in a new item */
            replace = mp->cursize;
            mp->cursize++;
        }
        else {
            /* get the oldest entry and replace data */
            replace = mp->realMRU[mp->cursize - 1] - 'a';
            COMCTL32_Free(mp->array[replace]);
        }
    }
    else {
        /* free up the old data */
        COMCTL32_Free(mp->array[replace]);
    }

    /* Allocate space for new item and move in the data */
    mp->array[replace] = witem = (LPWINEMRUITEM)COMCTL32_Alloc(cbData +
                                                               sizeof(WINEMRUITEM));
    witem->itemFlag |= WMRUIF_CHANGED;
    witem->size = cbData;
    memcpy( &witem->datastart, lpData, cbData);

    /* now rotate MRU list */
    mp->wineFlags |= WMRUF_CHANGED;
    for(i=mp->cursize-1; i>=1; i--) {
        mp->realMRU[i] = mp->realMRU[i-1];
    }
    mp->realMRU[0] = replace + 'a';
    TRACE("(%p, %p, %ld) adding data, /%c/ now most current\n",
          hList, lpData, cbData, replace+'a');
    ret = replace;

    if (!(mp->extview.dwFlags & MRUF_DELAYED_SAVE)) {
        /* save changed stuff right now */
        MRU_SaveChanged( mp );
    }

    return ret;
}

/**************************************************************************
 *              AddMRUStringW [COMCTL32.401]
 *
 * Add item to MRU string list.  If item already exists in list them it is
 * simply moved up to the top of the list and not added again.  If list is
 * full then the least recently used item is removed to make room.
 *
 * PARAMS
 *     hList [I] Handle to list.
 *     lpszString [I] ptr to string to add.
 *
 * RETURNS
 *     No. corresponding to registry name where value is stored 'a' -> 0 etc.
 *     -1 on error.
 */
INT WINAPI
AddMRUStringW(HANDLE hList, LPCWSTR lpszString)
{
    FIXME("(%p, %s) empty stub!\n", hList, debugstr_w(lpszString));

    return 0;
}

/**************************************************************************
 *              AddMRUStringA [COMCTL32.153]
 */
INT WINAPI
AddMRUStringA(HANDLE hList, LPCSTR lpszString)
{
    FIXME("(%p, %s) empty stub!\n", hList, debugstr_a(lpszString));

    return 0;
}

/**************************************************************************
 *              DelMRUString [COMCTL32.156]
 *
 * Removes item from either string or binary list (despite its name)
 *
 * PARAMS
 *    hList [I] list handle
 *    nItemPos [I] item position to remove 0 -> MRU
 *
 * RETURNS
 *    TRUE if successful, FALSE if nItemPos is out of range.
 */
BOOL WINAPI
DelMRUString(HANDLE hList, INT nItemPos)
{
    FIXME("(%p, %d): stub\n", hList, nItemPos);
    return TRUE;
}

/**************************************************************************
 *                  FindMRUStringW [COMCTL32.402]
 */
INT WINAPI
FindMRUStringW (HANDLE hList, LPCWSTR lpszString, LPINT lpRegNum)
{
  FIXME("stub\n");
  return -1;
}

/**************************************************************************
 *                  FindMRUStringA [COMCTL32.155]
 *
 * Searches string list for item that matches lpszString.
 * Returns position in list order 0 -> MRU and if lpRegNum != NULL then value
 * corresponding to item's reg. name will be stored in it ('a' -> 0).
 *
 * PARAMS
 *    hList [I] list handle
 *    lpszString [I] string to find
 *    lpRegNum [O] position in registry (maybe NULL)
 *
 * RETURNS
 *    Position in list 0 -> MRU.  -1 if item not found.
 */
INT WINAPI
FindMRUStringA (HANDLE hList, LPCSTR lpszString, LPINT lpRegNum)
{
    DWORD len = MultiByteToWideChar(CP_ACP, 0, lpszString, -1, NULL, 0);
    LPWSTR stringW = COMCTL32_Alloc(len * sizeof(WCHAR));
    INT ret;

    MultiByteToWideChar(CP_ACP, 0, lpszString, -1, stringW, len);
    ret = FindMRUData(hList, stringW, len * sizeof(WCHAR), lpRegNum);
    COMCTL32_Free(stringW);
    return ret;
}

/*************************************************************************
 *                 CreateMRUListLazy_common
 */
HANDLE CreateMRUListLazy_common(LPWINEMRULIST mp)
{
    UINT i, err;
    HKEY newkey;
    DWORD datasize, dwdisp;
    WCHAR realname[2];
    LPWINEMRUITEM witem;
    DWORD type;
    WCHAR emptyW[] = {'\0'};

    /* get space to save indices that will turn into names
     * but in order of most to least recently used
     */
    mp->realMRU = (LPSTR) COMCTL32_Alloc(mp->extview.nMaxItems + 2);

    /* get space to save pointers to actual data in order of
     * 'a' to 'z' (0 to n).
     */
    mp->array = (LPVOID) COMCTL32_Alloc(mp->extview.nMaxItems *
                                        sizeof(LPVOID));

    /* open the sub key */
    if ((err = RegCreateKeyExW( mp->extview.hKey, mp->extview.lpszSubKey,
                                0,
                                emptyW,
                                REG_OPTION_NON_VOLATILE,
                                KEY_READ | KEY_WRITE,
                                0,
                                &newkey,
                                &dwdisp))) {
        /* error - what to do ??? */
        ERR("(%lu %lu %lx %lx \"%s\" %p): Can not open key, error=%d\n",
            mp->extview.cbSize, mp->extview.nMaxItems, mp->extview.dwFlags,
            (DWORD)mp->extview.hKey, debugstr_w(mp->extview.lpszSubKey),
                                 mp->extview.lpfnCompare, err);
        return 0;
    }

    /* get values from key 'MRUList' */
    if (newkey) {
        datasize = mp->extview.nMaxItems + 1;
        if((err=RegQueryValueExA( newkey, "MRUList", 0, &type, mp->realMRU,
                                  &datasize))) {
            /* not present - set size to 1 (will become 0 later) */
            datasize = 1;
            *mp->realMRU = 0;
        }

        TRACE("MRU list = %s\n", mp->realMRU);

        mp->cursize = datasize - 1;
        /* datasize now has number of items in the MRUList */

        /* get actual values for each entry */
        realname[1] = 0;
        for(i=0; i<mp->cursize; i++) {
            realname[0] = 'a' + i;
            if(RegQueryValueExW( newkey, realname, 0, &type, 0, &datasize)) {
                /* not present - what to do ??? */
                ERR("Key %s not found 1\n", debugstr_w(realname));
            }
            mp->array[i] = witem = (LPWINEMRUITEM)COMCTL32_Alloc(datasize +
                                                                 sizeof(WINEMRUITEM));
            witem->size = datasize;
            if(RegQueryValueExW( newkey, realname, 0, &type,
                                 &witem->datastart, &datasize)) {
                /* not present - what to do ??? */
                ERR("Key %s not found 2\n", debugstr_w(realname));
            }
        }
        RegCloseKey( newkey );
    }
    else
        mp->cursize = 0;

    TRACE("(%lu %lu %lx %lx \"%s\" %p): Current Size = %ld\n",
          mp->extview.cbSize, mp->extview.nMaxItems, mp->extview.dwFlags,
          (DWORD)mp->extview.hKey, debugstr_w(mp->extview.lpszSubKey),
          mp->extview.lpfnCompare, mp->cursize);
    return (HANDLE)mp;
}

/**************************************************************************
 *                  CreateMRUListLazyW [COMCTL32.404]
 */
HANDLE WINAPI
CreateMRUListLazyW (LPCREATEMRULISTW lpcml, DWORD dwParam2, DWORD dwParam3, DWORD dwParam4)
{
    LPWINEMRULIST mp;

    if (lpcml == NULL)
        return 0;

    if (lpcml->cbSize < sizeof(CREATEMRULISTW))
        return 0;

    mp = (LPWINEMRULIST) COMCTL32_Alloc(sizeof(WINEMRULIST));
    memcpy(&mp->extview, lpcml, sizeof(CREATEMRULISTW));
    mp->extview.lpszSubKey = COMCTL32_Alloc((strlenW(lpcml->lpszSubKey) + 1) *
                                            sizeof(WCHAR));
    strcpyW((LPWSTR)mp->extview.lpszSubKey, lpcml->lpszSubKey);
    mp->isUnicode = TRUE;

    return CreateMRUListLazy_common(mp);
}

/**************************************************************************
 *                  CreateMRUListLazyA [COMCTL32.157]
 */
HANDLE WINAPI
CreateMRUListLazyA (LPCREATEMRULISTA lpcml, DWORD dwParam2, DWORD dwParam3, DWORD dwParam4)
{
    LPWINEMRULIST mp;
    DWORD len;

    if (lpcml == NULL)
        return 0;

    if (lpcml->cbSize < sizeof(CREATEMRULISTA))
        return 0;

    mp = (LPWINEMRULIST) COMCTL32_Alloc(sizeof(WINEMRULIST));
    memcpy(&mp->extview, lpcml, sizeof(CREATEMRULISTW));
    len = MultiByteToWideChar(CP_ACP, 0, lpcml->lpszSubKey, -1, NULL, 0);
    mp->extview.lpszSubKey = COMCTL32_Alloc(len * sizeof(WCHAR));
    MultiByteToWideChar(CP_ACP, 0, lpcml->lpszSubKey, -1,
                        (LPWSTR)mp->extview.lpszSubKey, len);
    mp->isUnicode = FALSE;
    return CreateMRUListLazy_common(mp);
}

/**************************************************************************
 *              CreateMRUListW [COMCTL32.400]
 *
 * PARAMS
 *     lpcml [I] ptr to CREATEMRULIST structure.
 *
 * RETURNS
 *     Handle to MRU list.
 */
HANDLE WINAPI
CreateMRUListW (LPCREATEMRULISTW lpcml)
{
    return CreateMRUListLazyW(lpcml, 0, 0, 0);
}

/**************************************************************************
 *              CreateMRUListA [COMCTL32.151]
 */
HANDLE WINAPI
CreateMRUListA (LPCREATEMRULISTA lpcml)
{
     return CreateMRUListLazyA (lpcml, 0, 0, 0);
}


/**************************************************************************
 *                EnumMRUListW [COMCTL32.403]
 *
 * Enumerate item in a list
 *
 * PARAMS
 *    hList [I] list handle
 *    nItemPos [I] item position to enumerate
 *    lpBuffer [O] buffer to receive item
 *    nBufferSize [I] size of buffer
 *
 * RETURNS
 *    For binary lists specifies how many bytes were copied to buffer, for
 *    string lists specifies full length of string.  Enumerating past the end
 *    of list returns -1.
 *    If lpBuffer == NULL or nItemPos is -ve return value is no. of items in
 *    the list.
 */
INT WINAPI EnumMRUListW(HANDLE hList, INT nItemPos, LPVOID lpBuffer,
DWORD nBufferSize)
{
    LPWINEMRULIST mp = (LPWINEMRULIST) hList;
    LPWINEMRUITEM witem;
    INT desired, datasize;

    if (nItemPos >= mp->cursize) return -1;
    if ((nItemPos < 0) || !lpBuffer) return mp->cursize;
    desired = mp->realMRU[nItemPos];
    desired -= 'a';
    TRACE("nItemPos=%d, desired=%d\n", nItemPos, desired);
    witem = mp->array[desired];
    datasize = min( witem->size, nBufferSize );
    memcpy( lpBuffer, &witem->datastart, datasize);
    TRACE("(%p, %d, %p, %ld): returning len=%d\n",
          hList, nItemPos, lpBuffer, nBufferSize, datasize);
    return datasize;
}

/**************************************************************************
 *                EnumMRUListA [COMCTL32.154]
 *
 */
INT WINAPI EnumMRUListA(HANDLE hList, INT nItemPos, LPVOID lpBuffer,
DWORD nBufferSize)
{
    LPWINEMRULIST mp = (LPWINEMRULIST) hList;
    LPWINEMRUITEM witem;
    INT desired, datasize;
    DWORD lenA;

    if (nItemPos >= mp->cursize) return -1;
    if ((nItemPos < 0) || !lpBuffer) return mp->cursize;
    desired = mp->realMRU[nItemPos];
    desired -= 'a';
    TRACE("nItemPos=%d, desired=%d\n", nItemPos, desired);
    witem = mp->array[desired];
    if(mp->extview.dwFlags & MRUF_BINARY_LIST) {
        datasize = min( witem->size, nBufferSize );
        memcpy( lpBuffer, &witem->datastart, datasize);
    } else {
        lenA = WideCharToMultiByte(CP_ACP, 0, (LPWSTR)&witem->datastart, -1,
                                   NULL, 0, NULL, NULL);
        datasize = min( witem->size, nBufferSize );
        WideCharToMultiByte(CP_ACP, 0, (LPWSTR)&witem->datastart, -1,
                            lpBuffer, datasize, NULL, NULL);
    }
    TRACE("(%p, %d, %p, %ld): returning len=%d\n",
          hList, nItemPos, lpBuffer, nBufferSize, datasize);
    return datasize;
}


/**************************************************************************
 * Str_GetPtrA [COMCTL32.233]
 *
 * PARAMS
 *     lpSrc   [I]
 *     lpDest  [O]
 *     nMaxLen [I]
 *
 * RETURNS
 */

INT WINAPI
Str_GetPtrA (LPCSTR lpSrc, LPSTR lpDest, INT nMaxLen)
{
    INT len;

    TRACE("(%p %p %d)\n", lpSrc, lpDest, nMaxLen);

    if (!lpDest && lpSrc)
        return strlen (lpSrc);

    if (nMaxLen == 0)
        return 0;

    if (lpSrc == NULL) {
        lpDest[0] = '\0';
        return 0;
    }

    len = strlen (lpSrc);
    if (len >= nMaxLen)
        len = nMaxLen - 1;

    RtlMoveMemory (lpDest, lpSrc, len);
    lpDest[len] = '\0';

    return len;
}


/**************************************************************************
 * Str_SetPtrA [COMCTL32.234]
 *
 * PARAMS
 *     lppDest [O]
 *     lpSrc   [I]
 *
 * RETURNS
 */

BOOL WINAPI
Str_SetPtrA (LPSTR *lppDest, LPCSTR lpSrc)
{
    TRACE("(%p %p)\n", lppDest, lpSrc);

    if (lpSrc) {
        LPSTR ptr = COMCTL32_ReAlloc (*lppDest, strlen (lpSrc) + 1);
        if (!ptr)
            return FALSE;
        strcpy (ptr, lpSrc);
        *lppDest = ptr;
    }
    else {
        if (*lppDest) {
            COMCTL32_Free (*lppDest);
            *lppDest = NULL;
        }
    }

    return TRUE;
}


/**************************************************************************
 * Str_GetPtrW [COMCTL32.235]
 *
 * PARAMS
 *     lpSrc   [I]
 *     lpDest  [O]
 *     nMaxLen [I]
 *
 * RETURNS
 */

INT WINAPI
Str_GetPtrW (LPCWSTR lpSrc, LPWSTR lpDest, INT nMaxLen)
{
    INT len;

    TRACE("(%p %p %d)\n", lpSrc, lpDest, nMaxLen);

    if (!lpDest && lpSrc)
        return strlenW (lpSrc);

    if (nMaxLen == 0)
        return 0;

    if (lpSrc == NULL) {
        lpDest[0] = L'\0';
        return 0;
    }

    len = strlenW (lpSrc);
    if (len >= nMaxLen)
        len = nMaxLen - 1;

    RtlMoveMemory (lpDest, lpSrc, len*sizeof(WCHAR));
    lpDest[len] = L'\0';

    return len;
}


/**************************************************************************
 * Str_SetPtrW [COMCTL32.236]
 *
 * PARAMS
 *     lpDest [O]
 *     lpSrc  [I]
 *
 * RETURNS
 */

BOOL WINAPI
Str_SetPtrW (LPWSTR *lppDest, LPCWSTR lpSrc)
{
    TRACE("(%p %p)\n", lppDest, lpSrc);

    if (lpSrc) {
        INT len = strlenW (lpSrc) + 1;
        LPWSTR ptr = COMCTL32_ReAlloc (*lppDest, len * sizeof(WCHAR));
        if (!ptr)
            return FALSE;
        strcpyW (ptr, lpSrc);
        *lppDest = ptr;
    }
    else {
        if (*lppDest) {
            COMCTL32_Free (*lppDest);
            *lppDest = NULL;
        }
    }

    return TRUE;
}


/**************************************************************************
 * Str_GetPtrWtoA [internal]
 *
 * Converts a unicode string into a multi byte string
 *
 * PARAMS
 *     lpSrc   [I] Pointer to the unicode source string
 *     lpDest  [O] Pointer to caller supplied storage for the multi byte string
 *     nMaxLen [I] Size, in bytes, of the destination buffer
 *
 * RETURNS
 *     Length, in bytes, of the converted string.
 */

INT
Str_GetPtrWtoA (LPCWSTR lpSrc, LPSTR lpDest, INT nMaxLen)
{
    INT len;

    TRACE("(%s %p %d)\n", debugstr_w(lpSrc), lpDest, nMaxLen);

    if (!lpDest && lpSrc)
        return WideCharToMultiByte(CP_ACP, 0, lpSrc, -1, 0, 0, NULL, NULL);

    if (nMaxLen == 0)
        return 0;

    if (lpSrc == NULL) {
        lpDest[0] = '\0';
        return 0;
    }

    len = WideCharToMultiByte(CP_ACP, 0, lpSrc, -1, 0, 0, NULL, NULL);
    if (len >= nMaxLen)
        len = nMaxLen - 1;

    WideCharToMultiByte(CP_ACP, 0, lpSrc, -1, lpDest, len, NULL, NULL);
    lpDest[len] = '\0';

    return len;
}


/**************************************************************************
 * Str_SetPtrAtoW [internal]
 *
 * Converts a multi byte string to a unicode string.
 * If the pointer to the destination buffer is NULL a buffer is allocated.
 * If the destination buffer is too small to keep the converted multi byte
 * string the destination buffer is reallocated. If the source pointer is
 * NULL, the destination buffer is freed.
 *
 * PARAMS
 *     lppDest [I/O] pointer to a pointer to the destination buffer
 *     lpSrc   [I] pointer to a multi byte string
 *
 * RETURNS
 *     TRUE: conversion successful
 *     FALSE: error
 */

BOOL
Str_SetPtrAtoW (LPWSTR *lppDest, LPCSTR lpSrc)
{
    TRACE("(%p %s)\n", lppDest, lpSrc);

    if (lpSrc) {
        INT len = MultiByteToWideChar(CP_ACP,0,lpSrc,-1,NULL,0);
        LPWSTR ptr = COMCTL32_ReAlloc (*lppDest, len*sizeof(WCHAR));

        if (!ptr)
            return FALSE;
        MultiByteToWideChar(CP_ACP,0,lpSrc,-1,ptr,len);
        *lppDest = ptr;
    }
    else {
        if (*lppDest) {
            COMCTL32_Free (*lppDest);
            *lppDest = NULL;
        }
    }

    return TRUE;
}


/**************************************************************************
 * The DSA-API is a set of functions to create and manipulate arrays of
 * fixed-size memory blocks. These arrays can store any kind of data
 * (strings, icons...).
 */

/**************************************************************************
 * DSA_Create [COMCTL32.320] Creates a dynamic storage array
 *
 * PARAMS
 *     nSize [I] size of the array elements
 *     nGrow [I] number of elements by which the array grows when it is filled
 *
 * RETURNS
 *     Success: pointer to an array control structure. Use this like a handle.
 *     Failure: NULL
 */

HDSA WINAPI
DSA_Create (INT nSize, INT nGrow)
{
    HDSA hdsa;

    TRACE("(size=%d grow=%d)\n", nSize, nGrow);

    hdsa = (HDSA)COMCTL32_Alloc (sizeof(DSA));
    if (hdsa)
    {
        hdsa->nItemCount = 0;
        hdsa->pData = NULL;
        hdsa->nMaxCount = 0;
        hdsa->nItemSize = nSize;
        hdsa->nGrow = max(1, nGrow);
    }

    return hdsa;
}


/**************************************************************************
 * DSA_Destroy [COMCTL32.321] Destroys a dynamic storage array
 *
 * PARAMS
 *     hdsa [I] pointer to the array control structure
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DSA_Destroy (const HDSA hdsa)
{
    TRACE("(%p)\n", hdsa);

    if (!hdsa)
        return FALSE;

    if (hdsa->pData && (!COMCTL32_Free (hdsa->pData)))
        return FALSE;

    return COMCTL32_Free (hdsa);
}


/**************************************************************************
 * DSA_GetItem [COMCTL32.322]
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] number of the Item to get
 *     pDest  [O] destination buffer. Has to be >= dwElementSize.
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DSA_GetItem (const HDSA hdsa, INT nIndex, LPVOID pDest)
{
    LPVOID pSrc;

    TRACE("(%p %d %p)\n", hdsa, nIndex, pDest);

    if (!hdsa)
        return FALSE;
    if ((nIndex < 0) || (nIndex >= hdsa->nItemCount))
        return FALSE;

    pSrc = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
    memmove (pDest, pSrc, hdsa->nItemSize);

    return TRUE;
}


/**************************************************************************
 * DSA_GetItemPtr [COMCTL32.323]
 *
 * Retrieves a pointer to the specified item.
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index of the desired item
 *
 * RETURNS
 *     Success: pointer to an item
 *     Failure: NULL
 */

LPVOID WINAPI
DSA_GetItemPtr (const HDSA hdsa, INT nIndex)
{
    LPVOID pSrc;

    TRACE("(%p %d)\n", hdsa, nIndex);

    if (!hdsa)
        return NULL;
    if ((nIndex < 0) || (nIndex >= hdsa->nItemCount))
        return NULL;

    pSrc = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);

    TRACE("-- ret=%p\n", pSrc);

    return pSrc;
}


/**************************************************************************
 * DSA_SetItem [COMCTL32.325]
 *
 * Sets the contents of an item in the array.
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index for the item
 *     pSrc   [I] pointer to the new item data
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DSA_SetItem (const HDSA hdsa, INT nIndex, LPVOID pSrc)
{
    INT  nSize, nNewItems;
    LPVOID pDest, lpTemp;

    TRACE("(%p %d %p)\n", hdsa, nIndex, pSrc);

    if ((!hdsa) || nIndex < 0)
        return FALSE;

    if (hdsa->nItemCount <= nIndex) {
        /* within the old array */
        if (hdsa->nMaxCount > nIndex) {
            /* within the allocated space, set a new boundary */
            hdsa->nItemCount = nIndex + 1;
        }
        else {
            /* resize the block of memory */
            nNewItems =
                hdsa->nGrow * ((INT)(((nIndex + 1) - 1) / hdsa->nGrow) + 1);
            nSize = hdsa->nItemSize * nNewItems;

            lpTemp = (LPVOID)COMCTL32_ReAlloc (hdsa->pData, nSize);
            if (!lpTemp)
                return FALSE;

            hdsa->nMaxCount = nNewItems;
            hdsa->nItemCount = nIndex + 1;
            hdsa->pData = lpTemp;
        }
    }

    /* put the new entry in */
    pDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
    TRACE("-- move dest=%p src=%p size=%d\n",
           pDest, pSrc, hdsa->nItemSize);
    memmove (pDest, pSrc, hdsa->nItemSize);

    return TRUE;
}


/**************************************************************************
 * DSA_InsertItem [COMCTL32.324]
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index for the new item
 *     pSrc   [I] pointer to the element
 *
 * RETURNS
 *     Success: position of the new item
 *     Failure: -1
 */

INT WINAPI
DSA_InsertItem (const HDSA hdsa, INT nIndex, LPVOID pSrc)
{
    INT   nNewItems, nSize;
    LPVOID  lpTemp, lpDest;

    TRACE("(%p %d %p)\n", hdsa, nIndex, pSrc);

    if ((!hdsa) || nIndex < 0)
        return -1;

    /* when nIndex >= nItemCount then append */
    if (nIndex >= hdsa->nItemCount)
        nIndex = hdsa->nItemCount;

    /* do we need to resize ? */
    if (hdsa->nItemCount >= hdsa->nMaxCount) {
        nNewItems = hdsa->nMaxCount + hdsa->nGrow;
        nSize = hdsa->nItemSize * nNewItems;

        lpTemp = (LPVOID)COMCTL32_ReAlloc (hdsa->pData, nSize);
        if (!lpTemp)
            return -1;

        hdsa->nMaxCount = nNewItems;
        hdsa->pData = lpTemp;
    }

    /* do we need to move elements ? */
    if (nIndex < hdsa->nItemCount) {
        lpTemp = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
        lpDest = (char *) lpTemp + hdsa->nItemSize;
        nSize = (hdsa->nItemCount - nIndex) * hdsa->nItemSize;
        TRACE("-- move dest=%p src=%p size=%d\n",
               lpDest, lpTemp, nSize);
        memmove (lpDest, lpTemp, nSize);
    }

    /* ok, we can put the new Item in */
    hdsa->nItemCount++;
    lpDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
    TRACE("-- move dest=%p src=%p size=%d\n",
           lpDest, pSrc, hdsa->nItemSize);
    memmove (lpDest, pSrc, hdsa->nItemSize);

    return nIndex;
}


/**************************************************************************
 * DSA_DeleteItem [COMCTL32.326]
 *
 * PARAMS
 *     hdsa   [I] pointer to the array control structure
 *     nIndex [I] index for the element to delete
 *
 * RETURNS
 *     Success: number of the deleted element
 *     Failure: -1
 */

INT WINAPI
DSA_DeleteItem (const HDSA hdsa, INT nIndex)
{
    LPVOID lpDest,lpSrc;
    INT  nSize;

    TRACE("(%p %d)\n", hdsa, nIndex);

    if (!hdsa)
        return -1;
    if (nIndex < 0 || nIndex >= hdsa->nItemCount)
        return -1;

    /* do we need to move ? */
    if (nIndex < hdsa->nItemCount - 1) {
        lpDest = (char *) hdsa->pData + (hdsa->nItemSize * nIndex);
        lpSrc = (char *) lpDest + hdsa->nItemSize;
        nSize = hdsa->nItemSize * (hdsa->nItemCount - nIndex - 1);
        TRACE("-- move dest=%p src=%p size=%d\n",
               lpDest, lpSrc, nSize);
        memmove (lpDest, lpSrc, nSize);
    }

    hdsa->nItemCount--;

    /* free memory ? */
    if ((hdsa->nMaxCount - hdsa->nItemCount) >= hdsa->nGrow) {
        nSize = hdsa->nItemSize * hdsa->nItemCount;

        lpDest = (LPVOID)COMCTL32_ReAlloc (hdsa->pData, nSize);
        if (!lpDest)
            return -1;

        hdsa->nMaxCount = hdsa->nItemCount;
        hdsa->pData = lpDest;
    }

    return nIndex;
}


/**************************************************************************
 * DSA_DeleteAllItems [COMCTL32.327]
 *
 * Removes all items and reinitializes the array.
 *
 * PARAMS
 *     hdsa [I] pointer to the array control structure
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DSA_DeleteAllItems (const HDSA hdsa)
{
    TRACE("(%p)\n", hdsa);

    if (!hdsa)
        return FALSE;
    if (hdsa->pData && (!COMCTL32_Free (hdsa->pData)))
        return FALSE;

    hdsa->nItemCount = 0;
    hdsa->pData = NULL;
    hdsa->nMaxCount = 0;

    return TRUE;
}


/**************************************************************************
 * The DPA-API is a set of functions to create and manipulate arrays of
 * pointers.
 */

/**************************************************************************
 * DPA_Create [COMCTL32.328] Creates a dynamic pointer array
 *
 * PARAMS
 *     nGrow [I] number of items by which the array grows when it is filled
 *
 * RETURNS
 *     Success: handle (pointer) to the pointer array.
 *     Failure: NULL
 */

HDPA WINAPI
DPA_Create (INT nGrow)
{
    HDPA hdpa;

    TRACE("(%d)\n", nGrow);

    hdpa = (HDPA)COMCTL32_Alloc (sizeof(DPA));
    if (hdpa) {
        hdpa->nGrow = max(8, nGrow);
        hdpa->hHeap = COMCTL32_hHeap;
        hdpa->nMaxCount = hdpa->nGrow * 2;
        hdpa->ptrs =
            (LPVOID*)COMCTL32_Alloc (hdpa->nMaxCount * sizeof(LPVOID));
    }

    TRACE("-- %p\n", hdpa);

    return hdpa;
}


/**************************************************************************
 * DPA_Destroy [COMCTL32.329] Destroys a dynamic pointer array
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DPA_Destroy (const HDPA hdpa)
{
    TRACE("(%p)\n", hdpa);

    if (!hdpa)
        return FALSE;

    if (hdpa->ptrs && (!HeapFree (hdpa->hHeap, 0, hdpa->ptrs)))
        return FALSE;

    return HeapFree (hdpa->hHeap, 0, hdpa);
}


/**************************************************************************
 * DPA_Grow [COMCTL32.330]
 *
 * Sets the growth amount.
 *
 * PARAMS
 *     hdpa  [I] handle (pointer) to the existing (source) pointer array
 *     nGrow [I] number of items by which the array grows when it's too small
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DPA_Grow (const HDPA hdpa, INT nGrow)
{
    TRACE("(%p %d)\n", hdpa, nGrow);

    if (!hdpa)
        return FALSE;

    hdpa->nGrow = max(8, nGrow);

    return TRUE;
}


/**************************************************************************
 * DPA_Clone [COMCTL32.331]
 *
 * Copies a pointer array to an other one or creates a copy
 *
 * PARAMS
 *     hdpa    [I] handle (pointer) to the existing (source) pointer array
 *     hdpaNew [O] handle (pointer) to the destination pointer array
 *
 * RETURNS
 *     Success: pointer to the destination pointer array.
 *     Failure: NULL
 *
 * NOTES
 *     - If the 'hdpaNew' is a NULL-Pointer, a copy of the source pointer
 *       array will be created and it's handle (pointer) is returned.
 *     - If 'hdpa' is a NULL-Pointer, the original implementation crashes,
 *       this implementation just returns NULL.
 */

HDPA WINAPI
DPA_Clone (const HDPA hdpa, const HDPA hdpaNew)
{
    INT nNewItems, nSize;
    HDPA hdpaTemp;

    if (!hdpa)
        return NULL;

    TRACE("(%p %p)\n", hdpa, hdpaNew);

    if (!hdpaNew) {
        /* create a new DPA */
        hdpaTemp = (HDPA)HeapAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY,
                                    sizeof(DPA));
        hdpaTemp->hHeap = hdpa->hHeap;
        hdpaTemp->nGrow = hdpa->nGrow;
    }
    else
        hdpaTemp = hdpaNew;

    if (hdpaTemp->ptrs) {
        /* remove old pointer array */
        HeapFree (hdpaTemp->hHeap, 0, hdpaTemp->ptrs);
        hdpaTemp->ptrs = NULL;
        hdpaTemp->nItemCount = 0;
        hdpaTemp->nMaxCount = 0;
    }

    /* create a new pointer array */
    nNewItems = hdpaTemp->nGrow *
                ((INT)((hdpa->nItemCount - 1) / hdpaTemp->nGrow) + 1);
    nSize = nNewItems * sizeof(LPVOID);
    hdpaTemp->ptrs =
        (LPVOID*)HeapAlloc (hdpaTemp->hHeap, HEAP_ZERO_MEMORY, nSize);
    hdpaTemp->nMaxCount = nNewItems;

    /* clone the pointer array */
    hdpaTemp->nItemCount = hdpa->nItemCount;
    memmove (hdpaTemp->ptrs, hdpa->ptrs,
             hdpaTemp->nItemCount * sizeof(LPVOID));

    return hdpaTemp;
}


/**************************************************************************
 * DPA_GetPtr [COMCTL32.332]
 *
 * Retrieves a pointer from a dynamic pointer array
 *
 * PARAMS
 *     hdpa   [I] handle (pointer) to the pointer array
 *     nIndex [I] array index of the desired pointer
 *
 * RETURNS
 *     Success: pointer
 *     Failure: NULL
 */

LPVOID WINAPI
DPA_GetPtr (const HDPA hdpa, INT nIndex)
{
    TRACE("(%p %d)\n", hdpa, nIndex);

    if (!hdpa)
        return NULL;
    if (!hdpa->ptrs) {
        WARN("no pointer array.\n");
        return NULL;
    }
    if ((nIndex < 0) || (nIndex >= hdpa->nItemCount)) {
        WARN("not enough pointers in array (%d vs %d).\n",nIndex,hdpa->nItemCount);
        return NULL;
    }

    TRACE("-- %p\n", hdpa->ptrs[nIndex]);

    return hdpa->ptrs[nIndex];
}


/**************************************************************************
 * DPA_GetPtrIndex [COMCTL32.333]
 *
 * Retrieves the index of the specified pointer
 *
 * PARAMS
 *     hdpa   [I] handle (pointer) to the pointer array
 *     p      [I] pointer
 *
 * RETURNS
 *     Success: index of the specified pointer
 *     Failure: -1
 */

INT WINAPI
DPA_GetPtrIndex (const HDPA hdpa, LPVOID p)
{
    INT i;

    if (!hdpa || !hdpa->ptrs)
        return -1;

    for (i = 0; i < hdpa->nItemCount; i++) {
        if (hdpa->ptrs[i] == p)
            return i;
    }

    return -1;
}


/**************************************************************************
 * DPA_InsertPtr [COMCTL32.334]
 *
 * Inserts a pointer into a dynamic pointer array
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the array
 *     i    [I] array index
 *     p    [I] pointer to insert
 *
 * RETURNS
 *     Success: index of the inserted pointer
 *     Failure: -1
 */

INT WINAPI
DPA_InsertPtr (const HDPA hdpa, INT i, LPVOID p)
{
    TRACE("(%p %d %p)\n", hdpa, i, p);

    if (!hdpa || i < 0) return -1;

    if (i >= 0x7fff)
        i = hdpa->nItemCount;

    if (i >= hdpa->nItemCount)
        return DPA_SetPtr(hdpa, i, p) ? i : -1;

    /* create empty spot at the end */
    if (!DPA_SetPtr(hdpa, hdpa->nItemCount, 0)) return -1;
    memmove (hdpa->ptrs + i + 1, hdpa->ptrs + i, (hdpa->nItemCount - i - 1) * sizeof(LPVOID));
    hdpa->ptrs[i] = p;
    return i;
}

/**************************************************************************
 * DPA_SetPtr [COMCTL32.335]
 *
 * Sets a pointer in the pointer array
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *     i    [I] index of the pointer that will be set
 *     p    [I] pointer to be set
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DPA_SetPtr (const HDPA hdpa, INT i, LPVOID p)
{
    LPVOID *lpTemp;

    TRACE("(%p %d %p)\n", hdpa, i, p);

    if (!hdpa || i < 0 || i > 0x7fff)
        return FALSE;

    if (hdpa->nItemCount <= i) {
        /* within the old array */
        if (hdpa->nMaxCount <= i) {
            /* resize the block of memory */
            INT nNewItems =
                hdpa->nGrow * ((INT)(((i+1) - 1) / hdpa->nGrow) + 1);
            INT nSize = nNewItems * sizeof(LPVOID);

            if (hdpa->ptrs)
                lpTemp = (LPVOID*)HeapReAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY, hdpa->ptrs, nSize);
            else
                lpTemp = (LPVOID*)HeapAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY, nSize);
            
            if (!lpTemp)
                return FALSE;

            hdpa->nMaxCount = nNewItems;
            hdpa->ptrs = lpTemp;
        }
        hdpa->nItemCount = i+1;
    }

    /* put the new entry in */
    hdpa->ptrs[i] = p;

    return TRUE;
}


/**************************************************************************
 * DPA_DeletePtr [COMCTL32.336]
 *
 * Removes a pointer from the pointer array.
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *     i    [I] index of the pointer that will be deleted
 *
 * RETURNS
 *     Success: deleted pointer
 *     Failure: NULL
 */

LPVOID WINAPI
DPA_DeletePtr (const HDPA hdpa, INT i)
{
    LPVOID *lpDest, *lpSrc, lpTemp = NULL;
    INT  nSize;

    TRACE("(%p %d)\n", hdpa, i);

    if ((!hdpa) || i < 0 || i >= hdpa->nItemCount)
        return NULL;

    lpTemp = hdpa->ptrs[i];

    /* do we need to move ?*/
    if (i < hdpa->nItemCount - 1) {
        lpDest = hdpa->ptrs + i;
        lpSrc = lpDest + 1;
        nSize = (hdpa->nItemCount - i - 1) * sizeof(LPVOID);
        TRACE("-- move dest=%p src=%p size=%x\n",
               lpDest, lpSrc, nSize);
        memmove (lpDest, lpSrc, nSize);
    }

    hdpa->nItemCount --;

    /* free memory ?*/
    if ((hdpa->nMaxCount - hdpa->nItemCount) >= hdpa->nGrow) {
        INT nNewItems = max(hdpa->nGrow * 2, hdpa->nItemCount);
        nSize = nNewItems * sizeof(LPVOID);
        lpDest = (LPVOID)HeapReAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY,
                                      hdpa->ptrs, nSize);
        if (!lpDest)
            return NULL;

        hdpa->nMaxCount = nNewItems;
        hdpa->ptrs = (LPVOID*)lpDest;
    }

    return lpTemp;
}


/**************************************************************************
 * DPA_DeleteAllPtrs [COMCTL32.337]
 *
 * Removes all pointers and reinitializes the array.
 *
 * PARAMS
 *     hdpa [I] handle (pointer) to the pointer array
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DPA_DeleteAllPtrs (const HDPA hdpa)
{
    TRACE("(%p)\n", hdpa);

    if (!hdpa)
        return FALSE;

    if (hdpa->ptrs && (!HeapFree (hdpa->hHeap, 0, hdpa->ptrs)))
        return FALSE;

    hdpa->nItemCount = 0;
    hdpa->nMaxCount = hdpa->nGrow * 2;
    hdpa->ptrs = (LPVOID*)HeapAlloc (hdpa->hHeap, HEAP_ZERO_MEMORY,
                                     hdpa->nMaxCount * sizeof(LPVOID));

    return TRUE;
}


/**************************************************************************
 * DPA_QuickSort [Internal]
 *
 * Ordinary quicksort (used by DPA_Sort).
 *
 * PARAMS
 *     lpPtrs     [I] pointer to the pointer array
 *     l          [I] index of the "left border" of the partition
 *     r          [I] index of the "right border" of the partition
 *     pfnCompare [I] pointer to the compare function
 *     lParam     [I] user defined value (3rd parameter in compare function)
 *
 * RETURNS
 *     NONE
 */

static VOID
DPA_QuickSort (LPVOID *lpPtrs, INT l, INT r,
               PFNDPACOMPARE pfnCompare, LPARAM lParam)
{
    INT m;
    LPVOID t;

    TRACE("l=%i r=%i\n", l, r);

    if (l==r)    /* one element is always sorted */
        return;
    if (r<l)     /* oops, got it in the wrong order */
        {
        DPA_QuickSort(lpPtrs, r, l, pfnCompare, lParam);
        return;
        }
    m = (l+r)/2; /* divide by two */
    DPA_QuickSort(lpPtrs, l, m, pfnCompare, lParam);
    DPA_QuickSort(lpPtrs, m+1, r, pfnCompare, lParam);

    /* join the two sides */
    while( (l<=m) && (m<r) )
    {
        if(pfnCompare(lpPtrs[l],lpPtrs[m+1],lParam)>0)
        {
            t = lpPtrs[m+1];
            memmove(&lpPtrs[l+1],&lpPtrs[l],(m-l+1)*sizeof lpPtrs[l]);
            lpPtrs[l] = t;

            m++;
        }
        l++;
    }
}


/**************************************************************************
 * DPA_Sort [COMCTL32.338]
 *
 * Sorts a pointer array using a user defined compare function
 *
 * PARAMS
 *     hdpa       [I] handle (pointer) to the pointer array
 *     pfnCompare [I] pointer to the compare function
 *     lParam     [I] user defined value (3rd parameter of compare function)
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DPA_Sort (const HDPA hdpa, PFNDPACOMPARE pfnCompare, LPARAM lParam)
{
    if (!hdpa || !pfnCompare)
        return FALSE;

    TRACE("(%p %p 0x%lx)\n", hdpa, pfnCompare, lParam);

    if ((hdpa->nItemCount > 1) && (hdpa->ptrs))
        DPA_QuickSort (hdpa->ptrs, 0, hdpa->nItemCount - 1,
                       pfnCompare, lParam);

    return TRUE;
}


/**************************************************************************
 * DPA_Search [COMCTL32.339]
 *
 * Searches a pointer array for a specified pointer
 *
 * PARAMS
 *     hdpa       [I] handle (pointer) to the pointer array
 *     pFind      [I] pointer to search for
 *     nStart     [I] start index
 *     pfnCompare [I] pointer to the compare function
 *     lParam     [I] user defined value (3rd parameter of compare function)
 *     uOptions   [I] search options
 *
 * RETURNS
 *     Success: index of the pointer in the array.
 *     Failure: -1
 *
 * NOTES
 *     Binary search taken from R.Sedgewick "Algorithms in C"!
 *     Function is NOT tested!
 *     If something goes wrong, blame HIM not ME! (Eric Kohl)
 */

INT WINAPI
DPA_Search (const HDPA hdpa, LPVOID pFind, INT nStart,
            PFNDPACOMPARE pfnCompare, LPARAM lParam, UINT uOptions)
{
    if (!hdpa || !pfnCompare || !pFind)
        return -1;

    TRACE("(%p %p %d %p 0x%08lx 0x%08x)\n",
           hdpa, pFind, nStart, pfnCompare, lParam, uOptions);

    if (uOptions & DPAS_SORTED) {
        /* array is sorted --> use binary search */
        INT l, r, x, n;
        LPVOID *lpPtr;

        TRACE("binary search\n");

        l = (nStart == -1) ? 0 : nStart;
        r = hdpa->nItemCount - 1;
        lpPtr = hdpa->ptrs;
        while (r >= l) {
            x = (l + r) / 2;
            n = (pfnCompare)(pFind, lpPtr[x], lParam);
            if (n < 0)
                r = x - 1;
            else
                l = x + 1;
            if (n == 0) {
                TRACE("-- ret=%d\n", n);
                return n;
            }
        }

        if (uOptions & DPAS_INSERTBEFORE) {
            TRACE("-- ret=%d\n", r);
            return r;
        }

        if (uOptions & DPAS_INSERTAFTER) {
            TRACE("-- ret=%d\n", l);
            return l;
        }
    }
    else {
        /* array is not sorted --> use linear search */
        LPVOID *lpPtr;
        INT  nIndex;

        TRACE("linear search\n");

        nIndex = (nStart == -1)? 0 : nStart;
        lpPtr = hdpa->ptrs;
        for (; nIndex < hdpa->nItemCount; nIndex++) {
            if ((pfnCompare)(pFind, lpPtr[nIndex], lParam) == 0) {
                TRACE("-- ret=%d\n", nIndex);
                return nIndex;
            }
        }
    }

    TRACE("-- not found: ret=-1\n");
    return -1;
}


/**************************************************************************
 * DPA_CreateEx [COMCTL32.340]
 *
 * Creates a dynamic pointer array using the specified size and heap.
 *
 * PARAMS
 *     nGrow [I] number of items by which the array grows when it is filled
 *     hHeap [I] handle to the heap where the array is stored
 *
 * RETURNS
 *     Success: handle (pointer) to the pointer array.
 *     Failure: NULL
 */

HDPA WINAPI
DPA_CreateEx (INT nGrow, HANDLE hHeap)
{
    HDPA hdpa;

    TRACE("(%d %p)\n", nGrow, hHeap);

    if (hHeap)
        hdpa = (HDPA)HeapAlloc (hHeap, HEAP_ZERO_MEMORY, sizeof(DPA));
    else
        hdpa = (HDPA)COMCTL32_Alloc (sizeof(DPA));

    if (hdpa) {
        hdpa->nGrow = min(8, nGrow);
        hdpa->hHeap = hHeap ? hHeap : COMCTL32_hHeap;
        hdpa->nMaxCount = hdpa->nGrow * 2;
        hdpa->ptrs =
            (LPVOID*)HeapAlloc (hHeap, HEAP_ZERO_MEMORY,
                                hdpa->nMaxCount * sizeof(LPVOID));
    }

    TRACE("-- %p\n", hdpa);

    return hdpa;
}


/**************************************************************************
 * Notification functions
 */

typedef struct tagNOTIFYDATA
{
    HWND hwndFrom;
    HWND hwndTo;
    DWORD  dwParam3;
    DWORD  dwParam4;
    DWORD  dwParam5;
    DWORD  dwParam6;
} NOTIFYDATA, *LPNOTIFYDATA;


/**************************************************************************
 * DoNotify [Internal]
 */

static LRESULT
DoNotify (LPNOTIFYDATA lpNotify, UINT uCode, LPNMHDR lpHdr)
{
    NMHDR nmhdr;
    LPNMHDR lpNmh = NULL;
    UINT idFrom = 0;

    TRACE("(%p %p %d %p 0x%08lx)\n",
           lpNotify->hwndFrom, lpNotify->hwndTo, uCode, lpHdr,
           lpNotify->dwParam5);

    if (!lpNotify->hwndTo)
        return 0;

    if (lpNotify->hwndFrom == (HWND)-1) {
        lpNmh = lpHdr;
        idFrom = lpHdr->idFrom;
    }
    else {
        if (lpNotify->hwndFrom) {
            HWND hwndParent = GetParent (lpNotify->hwndFrom);
            if (hwndParent) {
                hwndParent = GetWindow (lpNotify->hwndFrom, GW_OWNER);
                /* the following is done even if the return from above
                 * is zero.  GLA 12/2001 */
                idFrom = GetDlgCtrlID (lpNotify->hwndFrom);
            }
        }

        lpNmh = (lpHdr) ? lpHdr : &nmhdr;

        lpNmh->hwndFrom = lpNotify->hwndFrom;
        lpNmh->idFrom = idFrom;
        lpNmh->code = uCode;
    }

    return SendMessageA (lpNotify->hwndTo, WM_NOTIFY, idFrom, (LPARAM)lpNmh);
}


/**************************************************************************
 * SendNotify [COMCTL32.341]
 *
 * PARAMS
 *     hwndTo   [I]
 *     hwndFrom [I]
 *     uCode    [I]
 *     lpHdr    [I]
 *
 * RETURNS
 *     Success: return value from notification
 *     Failure: 0
 */

LRESULT WINAPI
COMCTL32_SendNotify (HWND hwndTo, HWND hwndFrom,
                     UINT uCode, LPNMHDR lpHdr)
{
    NOTIFYDATA notify;

    TRACE("(%p %p %d %p)\n",
           hwndTo, hwndFrom, uCode, lpHdr);

    notify.hwndFrom = hwndFrom;
    notify.hwndTo   = hwndTo;
    notify.dwParam5 = 0;
    notify.dwParam6 = 0;

    return DoNotify (&notify, uCode, lpHdr);
}


/**************************************************************************
 * SendNotifyEx [COMCTL32.342]
 *
 * PARAMS
 *     hwndFrom [I]
 *     hwndTo   [I]
 *     uCode    [I]
 *     lpHdr    [I]
 *     dwParam5 [I]
 *
 * RETURNS
 *     Success: return value from notification
 *     Failure: 0
 */

LRESULT WINAPI
COMCTL32_SendNotifyEx (HWND hwndTo, HWND hwndFrom, UINT uCode,
                       LPNMHDR lpHdr, DWORD dwParam5)
{
    NOTIFYDATA notify;
    HWND hwndNotify;

    TRACE("(%p %p %d %p 0x%08lx)\n",
           hwndFrom, hwndTo, uCode, lpHdr, dwParam5);

    hwndNotify = hwndTo;
    if (!hwndTo) {
        if (IsWindow (hwndFrom)) {
            hwndNotify = GetParent (hwndFrom);
            if (!hwndNotify)
                return 0;
        }
    }

    notify.hwndFrom = hwndFrom;
    notify.hwndTo   = hwndNotify;
    notify.dwParam5 = dwParam5;
    notify.dwParam6 = 0;

    return DoNotify (&notify, uCode, lpHdr);
}


/**************************************************************************
 * StrChrA [COMCTL32.350]
 *
 */

LPSTR WINAPI
COMCTL32_StrChrA (LPCSTR lpString, CHAR cChar)
{
    return strchr (lpString, cChar);
}


/**************************************************************************
 * StrStrIA [COMCTL32.355]
 */

LPSTR WINAPI
COMCTL32_StrStrIA (LPCSTR lpStr1, LPCSTR lpStr2)
{
    INT len1, len2, i;
    CHAR  first;

    if (*lpStr2 == 0)
        return ((LPSTR)lpStr1);
    len1 = 0;
    while (lpStr1[len1] != 0) ++len1;
    len2 = 0;
    while (lpStr2[len2] != 0) ++len2;
    if (len2 == 0)
        return ((LPSTR)(lpStr1 + len1));
    first = tolower (*lpStr2);
    while (len1 >= len2) {
        if (tolower(*lpStr1) == first) {
            for (i = 1; i < len2; ++i)
                if (tolower (lpStr1[i]) != tolower(lpStr2[i]))
                    break;
            if (i >= len2)
                return ((LPSTR)lpStr1);
        }
        ++lpStr1; --len1;
    }
    return (NULL);
}

/**************************************************************************
 * StrToIntA [COMCTL32.357] Converts a string to a signed integer.
 */

INT WINAPI
COMCTL32_StrToIntA (LPSTR lpString)
{
    return atoi(lpString);
}

/**************************************************************************
 * StrStrIW [COMCTL32.363]
 */

LPWSTR WINAPI
COMCTL32_StrStrIW (LPCWSTR lpStr1, LPCWSTR lpStr2)
{
    INT len1, len2, i;
    WCHAR  first;

    if (*lpStr2 == 0)
        return ((LPWSTR)lpStr1);
    len1 = 0;
    while (lpStr1[len1] != 0) ++len1;
    len2 = 0;
    while (lpStr2[len2] != 0) ++len2;
    if (len2 == 0)
        return ((LPWSTR)(lpStr1 + len1));
    first = tolowerW (*lpStr2);
    while (len1 >= len2) {
        if (tolowerW (*lpStr1) == first) {
            for (i = 1; i < len2; ++i)
                if (tolowerW (lpStr1[i]) != tolowerW(lpStr2[i]))
                    break;
            if (i >= len2)
                return ((LPWSTR)lpStr1);
        }
        ++lpStr1; --len1;
    }
    return (NULL);
}

/**************************************************************************
 * StrToIntW [COMCTL32.365] Converts a wide char string to a signed integer.
 */

INT WINAPI
COMCTL32_StrToIntW (LPWSTR lpString)
{
    return atoiW(lpString);
}


/**************************************************************************
 * DPA_EnumCallback [COMCTL32.385]
 *
 * Enumerates all items in a dynamic pointer array.
 *
 * PARAMS
 *     hdpa     [I] handle to the dynamic pointer array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     none
 */

VOID WINAPI
DPA_EnumCallback (const HDPA hdpa, DPAENUMPROC enumProc, LPARAM lParam)
{
    INT i;

    TRACE("(%p %p %08lx)\n", hdpa, enumProc, lParam);

    if (!hdpa)
        return;
    if (hdpa->nItemCount <= 0)
        return;

    for (i = 0; i < hdpa->nItemCount; i++) {
        if ((enumProc)(hdpa->ptrs[i], lParam) == 0)
            return;
    }

    return;
}


/**************************************************************************
 * DPA_DestroyCallback [COMCTL32.386]
 *
 * Enumerates all items in a dynamic pointer array and destroys it.
 *
 * PARAMS
 *     hdpa     [I] handle to the dynamic pointer array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DPA_DestroyCallback (const HDPA hdpa, DPAENUMPROC enumProc, LPARAM lParam)
{
    TRACE("(%p %p %08lx)\n", hdpa, enumProc, lParam);

    DPA_EnumCallback (hdpa, enumProc, lParam);

    return DPA_Destroy (hdpa);
}


/**************************************************************************
 * DSA_EnumCallback [COMCTL32.387]
 *
 * Enumerates all items in a dynamic storage array.
 *
 * PARAMS
 *     hdsa     [I] handle to the dynamic storage array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     none
 */

VOID WINAPI
DSA_EnumCallback (const HDSA hdsa, DSAENUMPROC enumProc, LPARAM lParam)
{
    INT i;

    TRACE("(%p %p %08lx)\n", hdsa, enumProc, lParam);

    if (!hdsa)
        return;
    if (hdsa->nItemCount <= 0)
        return;

    for (i = 0; i < hdsa->nItemCount; i++) {
        LPVOID lpItem = DSA_GetItemPtr (hdsa, i);
        if ((enumProc)(lpItem, lParam) == 0)
            return;
    }

    return;
}


/**************************************************************************
 * DSA_DestroyCallback [COMCTL32.388]
 *
 * Enumerates all items in a dynamic storage array and destroys it.
 *
 * PARAMS
 *     hdsa     [I] handle to the dynamic storage array
 *     enumProc [I]
 *     lParam   [I]
 *
 * RETURNS
 *     Success: TRUE
 *     Failure: FALSE
 */

BOOL WINAPI
DSA_DestroyCallback (const HDSA hdsa, DSAENUMPROC enumProc, LPARAM lParam)
{
    TRACE("(%p %p %08lx)\n", hdsa, enumProc, lParam);

    DSA_EnumCallback (hdsa, enumProc, lParam);

    return DSA_Destroy (hdsa);
}

/**************************************************************************
 * StrCSpnA [COMCTL32.356]
 *
 */
INT WINAPI COMCTL32_StrCSpnA( LPCSTR lpStr, LPCSTR lpSet) {
  return strcspn(lpStr, lpSet);
}

/**************************************************************************
 * StrChrW [COMCTL32.358]
 *
 */
LPWSTR WINAPI COMCTL32_StrChrW( LPCWSTR lpStart, WORD wMatch) {
  return strchrW(lpStart, wMatch);
}

/**************************************************************************
 * StrCmpNA [COMCTL32.352]
 *
 */
INT WINAPI COMCTL32_StrCmpNA( LPCSTR lpStr1, LPCSTR lpStr2, int nChar) {
  return strncmp(lpStr1, lpStr2, nChar);
}

/**************************************************************************
 * StrCmpNIA [COMCTL32.353]
 *
 */
INT WINAPI COMCTL32_StrCmpNIA( LPCSTR lpStr1, LPCSTR lpStr2, int nChar) {
  return strncasecmp(lpStr1, lpStr2, nChar);
}

/**************************************************************************
 * StrCmpNW [COMCTL32.360]
 *
 */
INT WINAPI COMCTL32_StrCmpNW( LPCWSTR lpStr1, LPCWSTR lpStr2, int nChar) {
  return strncmpW(lpStr1, lpStr2, nChar);
}

/**************************************************************************
 * StrCmpNIW [COMCTL32.361]
 *
 */
INT WINAPI COMCTL32_StrCmpNIW( LPCWSTR lpStr1, LPCWSTR lpStr2, int nChar) {
  FIXME("(%s, %s, %i): stub\n", debugstr_w(lpStr1), debugstr_w(lpStr2), nChar);
  return 0;
}

/**************************************************************************
 * StrRChrA [COMCTL32.351]
 *
 */
LPSTR WINAPI COMCTL32_StrRChrA( LPCSTR lpStart, LPCSTR lpEnd, WORD wMatch )
{
    LPCSTR lpGotIt = NULL;
    BOOL dbcs = IsDBCSLeadByte( LOBYTE(wMatch) );

    TRACE("(%p, %p, %x)\n", lpStart, lpEnd, wMatch);

    if (!lpEnd) lpEnd = lpStart + strlen(lpStart);

    for(; lpStart < lpEnd; lpStart = CharNextA(lpStart))
    {
        if (*lpStart != LOBYTE(wMatch)) continue;
        if (dbcs && lpStart[1] != HIBYTE(wMatch)) continue;
        lpGotIt = lpStart;
    }
    return (LPSTR)lpGotIt;
}


/**************************************************************************
 * StrRChrW [COMCTL32.359]
 *
 */
LPWSTR WINAPI COMCTL32_StrRChrW( LPCWSTR lpStart, LPCWSTR lpEnd, WORD wMatch)
{
    LPCWSTR lpGotIt = NULL;

    TRACE("(%p, %p, %x)\n", lpStart, lpEnd, wMatch);
    if (!lpEnd) lpEnd = lpStart + strlenW(lpStart);

    for(; lpStart < lpEnd; lpStart = CharNextW(lpStart))
        if (*lpStart == wMatch) lpGotIt = lpStart;

    return (LPWSTR)lpGotIt;
}


/**************************************************************************
 * StrStrA [COMCTL32.354]
 *
 */
LPSTR WINAPI COMCTL32_StrStrA( LPCSTR lpFirst, LPCSTR lpSrch) {
  return strstr(lpFirst, lpSrch);
}

/**************************************************************************
 * StrStrW [COMCTL32.362]
 *
 */
LPWSTR WINAPI COMCTL32_StrStrW( LPCWSTR lpFirst, LPCWSTR lpSrch) {
  return strstrW(lpFirst, lpSrch);
}

/**************************************************************************
 * StrSpnW [COMCTL32.364]
 *
 */
INT WINAPI COMCTL32_StrSpnW( LPWSTR lpStr, LPWSTR lpSet) {
  LPWSTR lpLoop = lpStr;

  /* validate ptr */
  if ((lpStr == 0) || (lpSet == 0)) return 0;

/* while(*lpLoop) { if lpLoop++; } */

  for(; (*lpLoop != 0); lpLoop++)
    if( strchrW(lpSet, *(WORD*)lpLoop))
      return (INT)(lpLoop-lpStr);

  return (INT)(lpLoop-lpStr);
}

/**************************************************************************
 * @ [COMCTL32.415]
 *
 * FIXME: What's this supposed to do?
 *        Parameter 1 is an HWND, you're on your own for the rest.
 */

BOOL WINAPI COMCTL32_415( HWND hwnd, DWORD b, DWORD c, DWORD d, DWORD e)
{

   FIXME("(%p, %lx, %lx, %lx, %lx): stub!\n", hwnd, b, c, d, e);

   return TRUE;
}

/**************************************************************************
 * @ [COMCTL32.417]
 *
 */
BOOL WINAPI COMCTL32_417(HDC hdc, INT x, INT y, UINT flags, const RECT *lprect,
                         LPCWSTR str, UINT count, const INT *lpDx)
{
    return ExtTextOutW(hdc, x, y, flags, lprect, str, count, lpDx);
}

/**************************************************************************
 * @ [COMCTL32.419]
 *
 * FIXME: What's this supposed to do?
 */

BOOL WINAPI COMCTL32_419( DWORD a, DWORD b, DWORD c, DWORD d)
{

   FIXME("(%lx, %lx, %lx, %lx): stub!\n", a, b, c, d);

   return TRUE;
}