VB.Net by API/System.Drawing/SelectionMode

SelectionMode.MultiExtended

   
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.ruponentModel.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
    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
    End Sub
End Class