VB.Net by API/System.Drawing/SelectionMode

SelectionMode.MultiExtended

<source lang="vbnet"> 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

1. 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

1. 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

 </source>