Get Control Handle and check its value
Imports System
Imports System.Drawing
Imports System.Reflection
Imports System.Windows.Forms
public class MainClass
Shared Sub Main()
Dim form1 As Form = New Form1
Application.Run(form1)
End Sub
End Class
Public Class Form1
Inherits System.Windows.Forms.Form
#Region " Windows Form Designer generated code "
Public Sub New()
MyBase.New()
'This call is required by the Windows Form Designer.
InitializeComponent()
'Add any initialization after the InitializeComponent() call
End Sub
'Form overrides dispose to clean up the component list.
Protected Overloads Overrides Sub Dispose(ByVal disposing As Boolean)
If disposing Then
If Not (components Is Nothing) Then
components.Dispose()
End If
End If
MyBase.Dispose(disposing)
End Sub
Friend WithEvents listBox1 As System.Windows.Forms.ListBox
Friend WithEvents chkMulti As System.Windows.Forms.CheckBox
Friend WithEvents lblWindow As System.Windows.Forms.Label
'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.chkMulti = New System.Windows.Forms.CheckBox()
Me.lblWindow = New System.Windows.Forms.Label()
Me.listBox1 = New System.Windows.Forms.ListBox()
Me.SuspendLayout()
'
'chkMulti
'
Me.chkMulti.Location = New System.Drawing.Point(192, 64)
Me.chkMulti.Name = "chkMulti"
Me.chkMulti.Size = New System.Drawing.Size(80, 16)
Me.chkMulti.TabIndex = 1
Me.chkMulti.Text = "MultiSelect"
'
'lblWindow
'
Me.lblWindow.Location = New System.Drawing.Point(32, 192)
Me.lblWindow.Name = "lblWindow"
Me.lblWindow.Size = New System.Drawing.Size(232, 16)
Me.lblWindow.TabIndex = 2
'
'listBox1
'
Me.listBox1.Location = New System.Drawing.Point(24, 24)
Me.listBox1.Name = "listBox1"
Me.listBox1.Size = New System.Drawing.Size(144, 160)
Me.listBox1.TabIndex = 0
'
'Form1
'
Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
Me.ClientSize = New System.Drawing.Size(292, 216)
Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.lblWindow, Me.chkMulti, Me.listBox1})
Me.Name = "Form1"
Me.Text = "Form1"
Me.ResumeLayout(False)
End Sub
#End Region
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim x As Integer
For x = 1 To 20
listBox1().Items.Add("Entry # " & CStr(x))
Next
lblWindow().Text = "hWnd = " & listBox1().Handle.ToString
End Sub
Private Sub chkMulti_CheckedChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles chkMulti.CheckedChanged
If chkMulti().CheckState = CheckState.Checked Then
listBox1().SelectionMode = SelectionMode.MultiExtended
Else
listBox1().SelectionMode = SelectionMode.One
End If
lblWindow().Text = "hWnd = " & listBox1().Handle.ToString
End Sub
End Class
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