Single Document Interface (SDI) Demo

Imports System
Imports System.Runtime.InteropServices
Imports System.Drawing
Imports System.ComponentModel
Imports System.Windows.Forms
Imports System.IO

Public Class MainClass
    
    Shared Sub Main(ByVal args As String())
        Dim myform As Form = New Form1()
        Application.Run(myform)

    End Sub

End Class


Public Class Form1
    Private m_FileLoaded As Boolean = False

    Private Sub mnuOpen_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles mnuOpen.Click
        If dlgOpen.ShowDialog() = Windows.Forms.DialogResult.OK Then
            Dim frm As Form1
            If m_FileLoaded Then
                frm = New Form1
            Else
                frm = Me
            End If

            frm.txtContents.Text = File.ReadAllText(dlgOpen.FileName)
            frm.Text = "# [" & New FileInfo(dlgOpen.FileName).Name & "]"
            frm.m_FileLoaded = True
            frm.Show()
        End If
    End Sub
End Class


<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form

    'Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overrides Sub Dispose(ByVal disposing As Boolean)
        If disposing AndAlso components IsNot Nothing Then
            components.Dispose()
        End If
        MyBase.Dispose(disposing)
    End Sub

    'Required by the Windows Form Designer
    Private components As System.ComponentModel.IContainer

    'NOTE: The following procedure is required by the Windows Form Designer
    'It can be modified using the Windows Form Designer.  
    'Do not modify it using the code editor.
    <System.Diagnostics.DebuggerStepThrough()> _
    Private Sub InitializeComponent()
        Me.MenuStrip1 = New System.Windows.Forms.MenuStrip
        Me.FileToolStripMenuItem = New System.Windows.Forms.ToolStripMenuItem
        Me.mnuOpen = New System.Windows.Forms.ToolStripMenuItem
        Me.dlgOpen = New System.Windows.Forms.OpenFileDialog
        Me.txtContents = New System.Windows.Forms.TextBox
        Me.MenuStrip1.SuspendLayout()
        Me.SuspendLayout()
        '
        'MenuStrip1
        '
        Me.MenuStrip1.Items.AddRange(New System.Windows.Forms.ToolStripItem() {Me.FileToolStripMenuItem})
        Me.MenuStrip1.Location = New System.Drawing.Point(0, 0)
        Me.MenuStrip1.Name = "MenuStrip1"
        Me.MenuStrip1.Size = New System.Drawing.Size(292, 24)
        Me.MenuStrip1.TabIndex = 9
        Me.MenuStrip1.Text = "MenuStrip1"
        '
        'FileToolStripMenuItem
        '
        Me.FileToolStripMenuItem.DropDownItems.AddRange(New System.Windows.Forms.ToolStripItem() {Me.mnuOpen})
        Me.FileToolStripMenuItem.Name = "FileToolStripMenuItem"
        Me.FileToolStripMenuItem.Size = New System.Drawing.Size(44, 20)
        Me.FileToolStripMenuItem.Text = "&File"
        '
        'mnuOpen
        '
        Me.mnuOpen.Name = "mnuOpen"
        Me.mnuOpen.ShortcutKeys = CType((System.Windows.Forms.Keys.Control Or System.Windows.Forms.Keys.O), System.Windows.Forms.Keys)
        Me.mnuOpen.Size = New System.Drawing.Size(168, 22)
        Me.mnuOpen.Text = "&Open"
        '
        'txtContents
        '
        Me.txtContents.Anchor = CType((((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                    Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right), System.Windows.Forms.AnchorStyles)
        Me.txtContents.Location = New System.Drawing.Point(0, 24)
        Me.txtContents.Multiline = True
        Me.txtContents.Name = "txtContents"
        Me.txtContents.Size = New System.Drawing.Size(292, 249)
        Me.txtContents.TabIndex = 8
        '
        'Form1
        '
        Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
        Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
        Me.ClientSize = New System.Drawing.Size(292, 273)
        Me.Controls.Add(Me.txtContents)
        Me.Controls.Add(Me.MenuStrip1)
        Me.Name = "Form1"
        Me.Text = "SdiEdit []"
        Me.MenuStrip1.ResumeLayout(False)
        Me.MenuStrip1.PerformLayout()
        Me.ResumeLayout(False)
        Me.PerformLayout()

    End Sub
    Friend WithEvents MenuStrip1 As System.Windows.Forms.MenuStrip
    Friend WithEvents FileToolStripMenuItem As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents mnuOpen As System.Windows.Forms.ToolStripMenuItem
    Friend WithEvents dlgOpen As System.Windows.Forms.OpenFileDialog
    Friend WithEvents txtContents As System.Windows.Forms.TextBox

End Class
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