source: trunk/src/user32/HOOK.CPP@ 3207

Last change on this file since 3207 was 3207, checked in by sandervl, 25 years ago

shared mutex fixes
File size: 20.3 KB
Line 
1/* $Id: HOOK.CPP,v 1.13 2000-03-23 19:24:25 sandervl Exp $ */
2
3/*
4 * Windows hook functions
5 *
6 * Copyright 1999 Sander van Leeuwen (OS/2 Port)
7 *
8 * Port of Wine code (windows\hook.c; dated 990920)
9 * All 16 bits code removed
10 *
11 * Copyright 1994, 1995 Alexandre Julliard
12 * 1996 Andrew Lewycky
13 *
14 * Based on investigations by Alex Korobka
15 *
16 *
17 * Project Odin Software License can be found in LICENSE.TXT
18 */
19
20/*
21 * Warning!
22 * A HHOOK is a 32-bit handle for compatibility with Windows 3.0 where it was
23 * a pointer to the next function. Now it is in fact composed of a USER heap
24 * handle in the low 16 bits and of a HOOK_MAGIC value in the high 16 bits.
25 */
26
27#include <os2win.h>
28#include "hook.h"
29#include "queue.h"
30#include "task.h"
31#include "winproc.h"
32#include "debugtools.h"
33#include <misc.h>
34#include <heapstring.h>
35#include <vmutex.h>
36#include <wprocess.h>
37
38#define DBG_LOCALLOG DBG_hook
39#include "dbglocal.h"
40
41DEFAULT_DEBUG_CHANNEL(hook)
42
43#include "pshpack1.h"
44
45 /* Hook data (pointed to by a HHOOK) */
46typedef struct
47{
48 HANDLE next; /* 00 Next hook in chain */
49 HOOKPROC proc; /* 04 Hook procedure (original) */
50 INT id; /* 08 Hook id (WH_xxx) */
51 DWORD ownerThread; /* 0C Owner thread (0 for system hook) */
52 HMODULE ownerModule; /* 10 Owner module */
53 DWORD flags; /* 14 flags */
54 DWORD magic; /* 18 magic dword */
55} HOOKDATA;
56
57#include "poppack.h"
58
59#define HOOK_MAGIC1 ((int)'H' | (int)'K' << 8) /* 'HK' */
60#define HOOK_MAGIC ((HOOK_MAGIC1<<16)|HOOK_MAGIC1) // 'HKHK'
61
62#define CHECK_MAGIC(a) ((a != 0) && (((HOOKDATA *)a)->magic == HOOK_MAGIC))
63
64//NOTE: This must be in the local data segment -> if a shared semaphore was
65// created by a different process, the handle returned by DosOpenMutexSem
66// will be returned in hGlobalHookMutex
67static HMTX hGlobalHookMutex = 0;
68
69//Global DLL Data
70#pragma data_seg(_GLOBALDATA)
71static HANDLE HOOK_systemHooks[WH_NB_HOOKS] = { 0 };
72static VMutex systemHookMutex(VMUTEX_SHARED, &hGlobalHookMutex);
73#pragma data_seg()
74static HANDLE HOOK_threadHooks[WH_NB_HOOKS] = { 0 };
75static VMutex threadHookMutex;
76
77typedef VOID (*HOOK_MapFunc)(INT, INT, WPARAM *, LPARAM *);
78typedef VOID (*HOOK_UnMapFunc)(INT, INT, WPARAM, LPARAM, WPARAM,
79 LPARAM);
80
81/***********************************************************************
82 * HOOK_Map32ATo32W
83 */
84static void HOOK_Map32ATo32W(INT id, INT code, WPARAM *pwParam,
85 LPARAM *plParam)
86{
87 if (id == WH_CBT && code == HCBT_CREATEWND)
88 {
89 LPCBT_CREATEWNDA lpcbtcwA = (LPCBT_CREATEWNDA)*plParam;
90 LPCBT_CREATEWNDW lpcbtcwW = (LPCBT_CREATEWNDW)HeapAlloc(GetProcessHeap(), 0,
91 sizeof(*lpcbtcwW) );
92 lpcbtcwW->lpcs = (CREATESTRUCTW*)HeapAlloc( GetProcessHeap(), 0, sizeof(*lpcbtcwW->lpcs) );
93
94 lpcbtcwW->hwndInsertAfter = lpcbtcwA->hwndInsertAfter;
95 *lpcbtcwW->lpcs = *(LPCREATESTRUCTW)lpcbtcwA->lpcs;
96
97 if (HIWORD(lpcbtcwA->lpcs->lpszName))
98 {
99 lpcbtcwW->lpcs->lpszName = HEAP_strdupAtoW( GetProcessHeap(), 0,
100 lpcbtcwA->lpcs->lpszName );
101 }
102 else
103 lpcbtcwW->lpcs->lpszName = (LPWSTR)lpcbtcwA->lpcs->lpszName;
104
105 if (HIWORD(lpcbtcwA->lpcs->lpszClass))
106 {
107 lpcbtcwW->lpcs->lpszClass = HEAP_strdupAtoW( GetProcessHeap(), 0,
108 lpcbtcwA->lpcs->lpszClass );
109 }
110 else
111 lpcbtcwW->lpcs->lpszClass = (LPCWSTR)lpcbtcwA->lpcs->lpszClass;
112 *plParam = (LPARAM)lpcbtcwW;
113 }
114 return;
115}
116
117
118/***********************************************************************
119 * HOOK_UnMap32ATo32W
120 */
121static void HOOK_UnMap32ATo32W(INT id, INT code, WPARAM wParamOrig,
122 LPARAM lParamOrig, WPARAM wParam,
123 LPARAM lParam)
124{
125 if (id == WH_CBT && code == HCBT_CREATEWND)
126 {
127 LPCBT_CREATEWNDW lpcbtcwW = (LPCBT_CREATEWNDW)lParam;
128 if (HIWORD(lpcbtcwW->lpcs->lpszName))
129 HeapFree( GetProcessHeap(), 0, (LPWSTR)lpcbtcwW->lpcs->lpszName );
130 if (HIWORD(lpcbtcwW->lpcs->lpszClass))
131 HeapFree( GetProcessHeap(), 0, (LPWSTR)lpcbtcwW->lpcs->lpszClass );
132 HeapFree( GetProcessHeap(), 0, lpcbtcwW->lpcs );
133 HeapFree( GetProcessHeap(), 0, lpcbtcwW );
134 }
135 return;
136}
137
138
139/***********************************************************************
140 * HOOK_Map32WTo32A
141 */
142static void HOOK_Map32WTo32A(INT id, INT code, WPARAM *pwParam,
143 LPARAM *plParam)
144{
145 if (id == WH_CBT && code == HCBT_CREATEWND)
146 {
147 LPCBT_CREATEWNDW lpcbtcwW = (LPCBT_CREATEWNDW)*plParam;
148 LPCBT_CREATEWNDA lpcbtcwA = (LPCBT_CREATEWNDA)HeapAlloc(GetProcessHeap(), 0,
149 sizeof(*lpcbtcwA) );
150 lpcbtcwA->lpcs = (CREATESTRUCTA*)HeapAlloc( GetProcessHeap(), 0, sizeof(*lpcbtcwA->lpcs) );
151
152 lpcbtcwA->hwndInsertAfter = lpcbtcwW->hwndInsertAfter;
153 *lpcbtcwA->lpcs = *(LPCREATESTRUCTA)lpcbtcwW->lpcs;
154
155 if (HIWORD(lpcbtcwW->lpcs->lpszName))
156 lpcbtcwA->lpcs->lpszName = HEAP_strdupWtoA( GetProcessHeap(), 0,
157 lpcbtcwW->lpcs->lpszName );
158 else
159 lpcbtcwA->lpcs->lpszName = (LPSTR)lpcbtcwW->lpcs->lpszName;
160
161 if (HIWORD(lpcbtcwW->lpcs->lpszClass))
162 lpcbtcwA->lpcs->lpszClass = HEAP_strdupWtoA( GetProcessHeap(), 0,
163 lpcbtcwW->lpcs->lpszClass );
164 else
165 lpcbtcwA->lpcs->lpszClass = (LPSTR)lpcbtcwW->lpcs->lpszClass;
166 *plParam = (LPARAM)lpcbtcwA;
167 }
168 return;
169}
170
171
172/***********************************************************************
173 * HOOK_UnMap32WTo32A
174 */
175static void HOOK_UnMap32WTo32A(INT id, INT code, WPARAM wParamOrig,
176 LPARAM lParamOrig, WPARAM wParam,
177 LPARAM lParam)
178{
179 if (id == WH_CBT && code == HCBT_CREATEWND)
180 {
181 LPCBT_CREATEWNDA lpcbtcwA = (LPCBT_CREATEWNDA)lParam;
182 if (HIWORD(lpcbtcwA->lpcs->lpszName))
183 HeapFree( GetProcessHeap(), 0, (LPSTR)lpcbtcwA->lpcs->lpszName );
184 if (HIWORD(lpcbtcwA->lpcs->lpszClass))
185 HeapFree( GetProcessHeap(), 0, (LPSTR)lpcbtcwA->lpcs->lpszClass );
186 HeapFree( GetProcessHeap(), 0, lpcbtcwA->lpcs );
187 HeapFree( GetProcessHeap(), 0, lpcbtcwA );
188 }
189 return;
190}
191
192
193/***********************************************************************
194 * Map Function Tables
195 */
196static const HOOK_MapFunc HOOK_MapFuncs[3][3] =
197{
198 { NULL, NULL, NULL },
199 { NULL, NULL, HOOK_Map32ATo32W },
200 { NULL, HOOK_Map32WTo32A, NULL }
201};
202
203static const HOOK_UnMapFunc HOOK_UnMapFuncs[3][3] =
204{
205 { NULL, NULL, NULL },
206 { NULL, NULL, HOOK_UnMap32ATo32W },
207 { NULL, HOOK_UnMap32WTo32A, NULL }
208};
209
210
211/***********************************************************************
212 * Internal Functions
213 */
214
215/***********************************************************************
216 * HOOK_GetNextHook
217 *
218 * Get the next hook of a given hook.
219 */
220static HANDLE HOOK_GetNextHook( HANDLE hook )
221{
222 HOOKDATA *data = (HOOKDATA *)hook;
223
224 if (!data || !hook) return 0;
225 if (data->next) return data->next;
226 if (!data->ownerThread) return 0; /* Already system hook */
227
228 /* Now start enumerating the system hooks */
229 return HOOK_systemHooks[data->id - WH_MINHOOK];
230}
231
232
233/***********************************************************************
234 * HOOK_GetHook
235 *
236 * Get the first hook for a given type.
237 */
238static HANDLE HOOK_GetHook( INT id, DWORD threadId )
239{
240 MESSAGEQUEUE *queue;
241 HANDLE hook = 0;
242 THDB *thdb;
243
244 thdb = GetTHDBFromThreadId(threadId);
245 if(thdb) {
246 hook = thdb->hooks[id - WH_MINHOOK];
247 }
248 if (!hook) hook = HOOK_systemHooks[id - WH_MINHOOK];
249
250 return hook;
251}
252
253
254/***********************************************************************
255 * HOOK_SetHook
256 *
257 * Install a given hook.
258 */
259static HHOOK HOOK_SetHook( INT id, LPVOID proc, INT type,
260 HMODULE hModule, DWORD dwThreadId )
261{
262 HOOKDATA *data;
263 THDB *thdb;
264
265 if ((id < WH_MINHOOK) || (id > WH_MAXHOOK) || !proc )
266 {
267 SetLastError(ERROR_INVALID_PARAMETER);
268 return 0;
269 }
270
271 dprintf(("Setting hook %d: %08x %04x %08lx\n",
272 id, (UINT)proc, hModule, dwThreadId ));
273
274#ifndef __WIN32OS2__
275 /* Create task queue if none present */
276 GetFastQueue16();
277
278 if (id == WH_JOURNALPLAYBACK) EnableHardwareInput16(FALSE);
279#endif
280
281
282 if (dwThreadId) /* Task-specific hook */
283 {
284 if ((id == WH_JOURNALRECORD) || (id == WH_JOURNALPLAYBACK) ||
285 (id == WH_SYSMSGFILTER)) {
286 SetLastError(ERROR_INVALID_PARAMETER);
287 return 0; /* System-only hooks */
288 }
289 }
290
291 /* Create the hook structure */
292
293 data = (HOOKDATA *) HeapAlloc(GetProcessHeap(), 0, sizeof(HOOKDATA));
294 data->proc = (HOOKPROC)proc;
295 data->id = id;
296 data->ownerThread = dwThreadId;
297 data->ownerModule = hModule;
298 data->flags = type;
299 data->magic = HOOK_MAGIC;
300
301 /* Insert it in the correct linked list */
302 if(dwThreadId)
303 {
304 thdb = GetTHDBFromThreadId(dwThreadId);
305 if(!thdb) {
306 dprintf(("HOOK_SetHook: can't find thread database for thread %x", dwThreadId));
307 return 0;
308 }
309 threadHookMutex.enter();
310 data->next = thdb->hooks[id - WH_MINHOOK];
311 thdb->hooks[id - WH_MINHOOK] = (DWORD)data;
312 threadHookMutex.leave();
313 }
314 else
315 {
316 systemHookMutex.enter(VMUTEX_WAIT_FOREVER, &hGlobalHookMutex);
317 data->next = HOOK_systemHooks[id - WH_MINHOOK];
318 HOOK_systemHooks[id - WH_MINHOOK] = (HANDLE)data;
319 systemHookMutex.leave(&hGlobalHookMutex);
320 }
321
322 return (HHOOK)data;
323}
324
325
326/***********************************************************************
327 * HOOK_RemoveHook
328 *
329 * Remove a hook from the list.
330 */
331static BOOL HOOK_RemoveHook( HOOKDATA *data )
332{
333 HOOKDATA **prevHook;
334 THDB *thdb;
335 VMutex *hookMutex;
336
337 dprintf(("Removing hook %08x\n", data));
338
339 if (data->flags & HOOK_INUSE)
340 {
341 /* Mark it for deletion later on */
342 dprintf(("Hook still running, deletion delayed\n" ));
343 data->flags |= HOOK_DELAYED_DELETE;
344 return TRUE;
345 }
346
347#ifndef __WIN32OS2__
348 if (data->id == WH_JOURNALPLAYBACK) EnableHardwareInput16(TRUE);
349#endif
350
351 /* Remove it from the linked list */
352
353 if (data->ownerThread)
354 {
355 thdb = GetTHDBFromThreadId(data->ownerThread);
356 if(!thdb) {
357 dprintf(("HOOK_RemoveHook: can't find thread database for thread %x", data->ownerThread));
358 return FALSE;
359 }
360 hookMutex = &threadHookMutex;
361 hookMutex->enter();
362 prevHook = (HOOKDATA **)&thdb->hooks[data->id - WH_MINHOOK];
363 }
364 else {
365 hookMutex = &systemHookMutex;
366 hookMutex->enter();
367 prevHook = (HOOKDATA **)&HOOK_systemHooks[data->id - WH_MINHOOK];
368 }
369 while (*prevHook && *prevHook != data)
370 prevHook = (HOOKDATA **)&(*prevHook)->next;
371
372 if (!prevHook) {
373 hookMutex->leave();
374 return FALSE;
375 }
376 *prevHook = (HOOKDATA *)data->next;
377 hookMutex->leave();
378
379 HeapFree(GetProcessHeap(), 0, (LPVOID)data );
380 return TRUE;
381}
382
383
384/***********************************************************************
385 * HOOK_FindValidHook
386 */
387static HANDLE HOOK_FindValidHook( HANDLE hook )
388{
389 HOOKDATA *data;
390
391 for (;;)
392 {
393 if (!(data = (HOOKDATA *)hook)) return 0;
394 if (data->proc) return hook;
395 hook = data->next;
396 }
397}
398
399
400/***********************************************************************
401 * HOOK_CallHook
402 *
403 * Call a hook procedure.
404 */
405static LRESULT HOOK_CallHook( HANDLE hook, INT fromtype, INT code,
406 WPARAM wParam, LPARAM lParam )
407{
408 MESSAGEQUEUE *queue;
409 HANDLE prevHook;
410 HOOKDATA *data = (HOOKDATA *)hook;
411 LRESULT ret;
412
413 WPARAM wParamOrig = wParam;
414 LPARAM lParamOrig = lParam;
415 HOOK_MapFunc MapFunc;
416 HOOK_UnMapFunc UnMapFunc;
417
418 MapFunc = HOOK_MapFuncs[fromtype][data->flags & HOOK_MAPTYPE];
419 UnMapFunc = HOOK_UnMapFuncs[fromtype][data->flags & HOOK_MAPTYPE];
420
421 if (MapFunc)
422 MapFunc( data->id, code, &wParam, &lParam );
423
424 /* Now call it */
425
426 data->flags |= HOOK_INUSE;
427
428 dprintf2(("Calling hook %04x: %d %08x %08lx\n", hook, code, wParam, lParam ));
429
430 ret = data->proc(code, wParam, lParam);
431
432 data->flags &= ~HOOK_INUSE;
433
434 if (UnMapFunc)
435 UnMapFunc( data->id, code, wParamOrig, lParamOrig, wParam, lParam );
436
437 if(data->flags & HOOK_DELAYED_DELETE) HOOK_RemoveHook( data );
438
439 return ret;
440}
441
442/***********************************************************************
443 * Exported Functions & APIs
444 */
445
446/***********************************************************************
447 * HOOK_IsHooked
448 *
449 * Replacement for calling HOOK_GetHook from other modules.
450 */
451BOOL HOOK_IsHooked( INT id )
452{
453 /* Hmmm. Use GetThreadQueue(0) instead of GetFastQueue() here to
454 avoid queue being created if someone wants to merely check ... */
455
456 return HOOK_GetHook( id, GetCurrentThreadId() ) != 0;
457}
458
459/***********************************************************************
460 * HOOK_CallHooks32A
461 *
462 * Call a hook chain.
463 */
464LRESULT HOOK_CallHooksA( INT id, INT code, WPARAM wParam,
465 LPARAM lParam )
466{
467 HANDLE hook;
468
469 if (!(hook = HOOK_GetHook( id, GetCurrentThreadId() ))) return 0;
470 if (!(hook = HOOK_FindValidHook(hook))) return 0;
471 return HOOK_CallHook( hook, HOOK_WIN32A, code, wParam, lParam );
472}
473
474/***********************************************************************
475 * HOOK_CallHooks32W
476 *
477 * Call a hook chain.
478 */
479LRESULT HOOK_CallHooksW( INT id, INT code, WPARAM wParam,
480 LPARAM lParam )
481{
482 HANDLE hook;
483
484 if (!(hook = HOOK_GetHook( id, GetCurrentThreadId() ))) return 0;
485 if (!(hook = HOOK_FindValidHook(hook))) return 0;
486 return HOOK_CallHook( hook, HOOK_WIN32W, code, wParam,
487 lParam );
488}
489
490
491#if 0
492/***********************************************************************
493 * HOOK_ResetQueueHooks
494 */
495void HOOK_ResetQueueHooks( HQUEUE hQueue )
496{
497 MESSAGEQUEUE *queue;
498
499 if ((queue = (MESSAGEQUEUE *)QUEUE_Lock( hQueue )) != NULL)
500 {
501 HOOKDATA* data;
502 HHOOK hook;
503 int id;
504 for( id = WH_MINHOOK; id <= WH_MAXHOOK; id++ )
505 {
506 hook = queue->hooks[id - WH_MINHOOK];
507 while( hook )
508 {
509 if( (data = (HOOKDATA *)hook) )
510 {
511 data->ownerQueue = hQueue;
512 hook = data->next;
513 } else break;
514 }
515 }
516
517 QUEUE_Unlock( queue );
518 }
519}
520#endif
521
522/***********************************************************************
523 * HOOK_FreeModuleHooks
524 */
525void HOOK_FreeModuleHooks( HMODULE hModule )
526{
527 /* remove all system hooks registered by this module */
528
529 HOOKDATA* hptr;
530 HHOOK hook, next;
531 int id;
532
533 for( id = WH_MINHOOK; id <= WH_MAXHOOK; id++ )
534 {
535 hook = HOOK_systemHooks[id - WH_MINHOOK];
536 while( hook )
537 {
538 hptr = (HOOKDATA *)hook;
539 if (hptr)
540 {
541 next = hptr->next;
542 if( hptr->ownerModule == hModule )
543 {
544 hptr->flags &= HOOK_MAPTYPE;
545 HOOK_RemoveHook(hptr);
546 }
547 hook = next;
548 }
549 else hook = 0;
550 }
551 }
552}
553
554/***********************************************************************
555 * HOOK_FreeQueueHooks
556 */
557void HOOK_FreeQueueHooks( DWORD threadId )
558{
559 /* remove all hooks registered by this queue */
560
561 HOOKDATA* hptr = NULL;
562 HHOOK hook, next;
563 int id;
564
565 for( id = WH_MINHOOK; id <= WH_MAXHOOK; id++ )
566 {
567 hook = HOOK_GetHook( id, threadId );
568 while( hook )
569 {
570 next = HOOK_GetNextHook(hook);
571
572 hptr = (HOOKDATA *)hook;
573 if( hptr && hptr->ownerThread == threadId )
574 {
575 hptr->flags &= HOOK_MAPTYPE;
576 HOOK_RemoveHook(hptr);
577 }
578 hook = next;
579 }
580 }
581}
582
583
584/***********************************************************************
585 * SetWindowsHook32A (USER32.525)
586 */
587HHOOK WINAPI SetWindowsHookA( INT id, HOOKPROC proc )
588{
589 return SetWindowsHookExA( id, proc, 0, GetCurrentThreadId() );
590}
591
592/***********************************************************************
593 * SetWindowsHook32W (USER32.528)
594 */
595HHOOK WINAPI SetWindowsHookW( INT id, HOOKPROC proc )
596{
597 return SetWindowsHookExW( id, proc, 0, GetCurrentThreadId() );
598}
599
600/***********************************************************************
601 * SetWindowsHookEx32A (USER32.526)
602 */
603HHOOK WINAPI SetWindowsHookExA( INT id, HOOKPROC proc, HINSTANCE hInst,
604 DWORD dwThreadId )
605{
606 return HOOK_SetHook( id, proc, HOOK_WIN32A, hInst, dwThreadId );
607}
608
609/***********************************************************************
610 * SetWindowsHookEx32W (USER32.527)
611 */
612HHOOK WINAPI SetWindowsHookExW( INT id, HOOKPROC proc, HINSTANCE hInst,
613 DWORD dwThreadId )
614{
615 return HOOK_SetHook( id, proc, HOOK_WIN32W, hInst, dwThreadId );
616}
617
618/***********************************************************************
619 * UnhookWindowsHook32 (USER32.557)
620 */
621BOOL WINAPI UnhookWindowsHook( INT id, HOOKPROC proc )
622{
623 HANDLE hook = HOOK_GetHook( id, GetCurrentThreadId() );
624
625 dprintf(("UnhookWindowsHook: %d %08lx\n", id, (DWORD)proc ));
626
627 while (hook)
628 {
629 HOOKDATA *data = (HOOKDATA *)hook;
630 if (data->proc == proc) break;
631 hook = HOOK_GetNextHook( hook );
632 }
633 if (!hook) return FALSE;
634 return HOOK_RemoveHook( (HOOKDATA *)hook );
635}
636
637
638/***********************************************************************
639 * UnhookWindowHookEx32 (USER32.558)
640 */
641BOOL WINAPI UnhookWindowsHookEx( HHOOK hhook )
642{
643 if (CHECK_MAGIC(hhook) == FALSE)
644 return FALSE;
645
646 return HOOK_RemoveHook( (HOOKDATA *)hhook );
647}
648
649/***********************************************************************
650 * CallNextHookEx32 (USER32.17)
651 *
652 * There aren't ANSI and UNICODE versions of this.
653 */
654LRESULT WINAPI CallNextHookEx( HHOOK hhook, INT code, WPARAM wParam,
655 LPARAM lParam )
656{
657 HANDLE next;
658 INT fromtype; /* figure out Ansi/Unicode */
659 HOOKDATA *oldhook;
660
661 if (CHECK_MAGIC(hhook) == FALSE)
662 return FALSE;
663
664 if (!(next = HOOK_GetNextHook( hhook ))) return 0;
665
666 oldhook = (HOOKDATA *)hhook ;
667 fromtype = oldhook->flags & HOOK_MAPTYPE;
668
669 return HOOK_CallHook( next, fromtype, code, wParam, lParam );
670}
671
672
673/***********************************************************************
674 * CallMsgFilter32A (USER32.15)
675 */
676/*
677 * FIXME: There are ANSI and UNICODE versions of this, plus an unspecified
678 * version, plus USER (the 16bit one) has a CallMsgFilter32 function.
679 */
680BOOL WINAPI CallMsgFilterA( LPMSG msg, INT code )
681{
682#if 0 //CB: not a Win32 API and unimplemented
683 if (GetSysModalWindow()) return FALSE; /* ??? */
684#endif
685 if (HOOK_CallHooksA( WH_SYSMSGFILTER, code, 0, (LPARAM)msg ))
686 return TRUE;
687 return HOOK_CallHooksA( WH_MSGFILTER, code, 0, (LPARAM)msg );
688}
689
690
691/***********************************************************************
692 * CallMsgFilter32W (USER32.16)
693 */
694BOOL WINAPI CallMsgFilterW( LPMSG msg, INT code )
695{
696#if 0 //CB: not a Win32 API and unimplemented
697 if (GetSysModalWindow()) return FALSE; /* ??? */
698#endif
699 if (HOOK_CallHooksW( WH_SYSMSGFILTER, code, 0, (LPARAM)msg ))
700 return TRUE;
701 return HOOK_CallHooksW( WH_MSGFILTER, code, 0, (LPARAM)msg );
702}
703
704
705BOOL ProcessKbdHook(LPMSG msg, BOOL remove )
706{
707 return (HOOK_CallHooksA( WH_KEYBOARD, remove ? HC_ACTION : HC_NOREMOVE,
708 LOWORD (msg->wParam), msg->lParam )
709 ? TRUE : FALSE);
710}
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