VB.Net/GUI/ListBox

Add Item to a List Box by clicking a Button

 
Imports System
Imports System.Windows.Forms
Public Class MainClass
  Shared Sub Main()
     Dim form1 As Form1 = 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 Button1 As System.Windows.Forms.Button
  Friend WithEvents ListBox1 As System.Windows.Forms.ListBox
  "Required by the Windows Form Designer
  Private components As System.ruponentModel.Container
  "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.Button1 = New System.Windows.Forms.Button()
    Me.ListBox1 = New System.Windows.Forms.ListBox()
    Me.SuspendLayout()
    "
    "Button1
    "
    Me.Button1.Location = New System.Drawing.Point(32, 328)
    Me.Button1.Name = "Button1"
    Me.Button1.Size = New System.Drawing.Size(280, 32)
    Me.Button1.TabIndex = 0
    Me.Button1.Text = "Show hidden files"
    "
    "ListBox1
    "
    Me.ListBox1.HorizontalScrollbar = True
    Me.ListBox1.ItemHeight = 16
    Me.ListBox1.Location = New System.Drawing.Point(24, 56)
    Me.ListBox1.Name = "ListBox1"
    Me.ListBox1.ScrollAlwaysVisible = True
    Me.ListBox1.Size = New System.Drawing.Size(280, 244)
    Me.ListBox1.TabIndex = 1
    "
    "Form1
    "
    Me.AutoScaleBaseSize = New System.Drawing.Size(6, 15)
    Me.ClientSize = New System.Drawing.Size(328, 384)
    Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.ListBox1, Me.Button1})
    Me.Name = "Form1"
    Me.Text = "Add to List Box"
    Me.ResumeLayout(False)
  End Sub
#End Region
  Private Sub Button1_Click(ByVal sender As System.Object, _
    ByVal e As System.EventArgs) Handles Button1.Click
    Me.Cursor = System.Windows.Forms.Cursors.WaitCursor
    ListBox1.Items.Clear()
    ListBox1.Items.Add("Item A")
    Me.Cursor = System.Windows.Forms.Cursors.Default
  End Sub
End Class

Add Item to ListBox

 
Imports System
Imports System.Drawing
Imports System.Data
Imports System.IO
Imports System.Collections
Imports System.Windows.Forms
Imports System.Xml
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
    "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.
    Friend WithEvents lstEmails As System.Windows.Forms.ListBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.lstEmails = New System.Windows.Forms.ListBox()
        Me.SuspendLayout()
        "
        "lstEmails
        "
        Me.lstEmails.IntegralHeight = False
        Me.lstEmails.Location = New System.Drawing.Point(16, 16)
        Me.lstEmails.Name = "lstEmails"
        Me.lstEmails.Size = New System.Drawing.Size(264, 224)
        Me.lstEmails.TabIndex = 0
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 253)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.lstEmails})
        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
         lstEmails.Items.Add("a")
    End Sub
End Class

Add, remove and clear list box items

 
Imports System
Imports System.Drawing
Imports System.Windows.Forms
Public Class MainClass
   Shared Sub Main()
        Dim myform As Form = New FrmListBox()
        Application.Run(myform)
   End Sub " Main
End Class
Public Class FrmListBox
   Inherits 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
   " contains user-input list of elements
   Friend WithEvents lstDisplay As ListBox
   " user input textbox
   Friend WithEvents txtInput As TextBox
   " add, remove, clear and exit command buttons
   Friend WithEvents cmdAdd As Button
   Friend WithEvents cmdRemove As Button
   Friend WithEvents cmdClear As Button
   "Required by the Windows Form Designer
   Private components As System.ruponentModel.Container
   "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.cmdClear = New System.Windows.Forms.Button()
      Me.cmdAdd = New System.Windows.Forms.Button()
      Me.txtInput = New System.Windows.Forms.TextBox()
      Me.cmdRemove = New System.Windows.Forms.Button()
      Me.lstDisplay = New System.Windows.Forms.ListBox()
      Me.SuspendLayout()
      "
      "cmdClear
      "
      Me.cmdClear.Location = New System.Drawing.Point(160, 144)
      Me.cmdClear.Name = "cmdClear"
      Me.cmdClear.Size = New System.Drawing.Size(104, 40)
      Me.cmdClear.TabIndex = 4
      Me.cmdClear.Text = "Clear"
      "
      "cmdAdd
      "
      Me.cmdAdd.Location = New System.Drawing.Point(160, 48)
      Me.cmdAdd.Name = "cmdAdd"
      Me.cmdAdd.Size = New System.Drawing.Size(104, 40)
      Me.cmdAdd.TabIndex = 2
      Me.cmdAdd.Text = "Add"
      "
      "txtInput
      "
      Me.txtInput.Location = New System.Drawing.Point(160, 8)
      Me.txtInput.Name = "txtInput"
      Me.txtInput.Size = New System.Drawing.Size(104, 20)
      Me.txtInput.TabIndex = 1
      Me.txtInput.Text = ""
      "
      "cmdRemove
      "
      Me.cmdRemove.Location = New System.Drawing.Point(160, 96)
      Me.cmdRemove.Name = "cmdRemove"
      Me.cmdRemove.Size = New System.Drawing.Size(104, 40)
      Me.cmdRemove.TabIndex = 3
      Me.cmdRemove.Text = "Remove"
      "
      "lstDisplay
      "
      Me.lstDisplay.Location = New System.Drawing.Point(16, 8)
      Me.lstDisplay.Name = "lstDisplay"
      Me.lstDisplay.Size = New System.Drawing.Size(120, 238)
      Me.lstDisplay.TabIndex = 0
      "
      "FrmListBox
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(292, 273)
      Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.cmdClear, Me.cmdRemove, Me.cmdAdd, Me.txtInput, Me.lstDisplay})
      Me.Name = "FrmListBox"
      Me.Text = "ListBoxTest"
      Me.ResumeLayout(False)
   End Sub
#End Region
   Private Sub cmdAdd_Click(ByVal sender As System.Object, _
      ByVal e As System.EventArgs) Handles cmdAdd.Click
      lstDisplay.Items.Add(txtInput.Text)
      txtInput.Text = ""
   End Sub
   Private Sub cmdRemove_Click(ByVal sender As System.Object, _
      ByVal e As System.EventArgs) Handles cmdRemove.Click
      If lstDisplay.SelectedIndex <> -1 Then
         lstDisplay.Items.RemoveAt(lstDisplay.SelectedIndex)
      End If
   End Sub
   Private Sub cmdClear_Click(ByVal sender As System.Object, _
      ByVal e As System.EventArgs) Handles cmdClear.Click
      lstDisplay.Items.Clear()
   End Sub " cmdClear_Click
End Class

Customize ListBox Font and Item Height

 
Imports System
Imports System.ruponentModel
Imports System.Windows.Forms
Imports System.Data
Imports System.Configuration
Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Drawing.Text
Public Class MainClass
    
    Shared Sub Main()
        
        Dim myform As Form = New OwnerDrawnVariableListBox()
        Application.Run(myform)
    End Sub
End Class

Public Class OwnerDrawnVariableListBox
    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
    "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.
    Friend WithEvents listBox2 As System.Windows.Forms.ListBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.listBox2 = New System.Windows.Forms.ListBox()
        Me.SuspendLayout()
        "
        "listBox2
        "
        Me.listBox2.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable
        Me.listBox2.Items.AddRange(New Object() {"A", "B", "C"})
        Me.listBox2.Location = New System.Drawing.Point(6, 37)
        Me.listBox2.Name = "listBox2"
        Me.listBox2.Size = New System.Drawing.Size(280, 192)
        Me.listBox2.TabIndex = 5
        "
        "OwnerDrawnVariableListBox
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 266)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.listBox2})
        Me.Name = "OwnerDrawnVariableListBox"
        Me.Text = "OwnerDrawnVariableListBox"
        Me.ResumeLayout(False)
    End Sub
#End Region
    Private Sub listBox2_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles listBox2.DrawItem
        e.DrawBackground()
        Dim textFont As Font
        If e.Index Mod 2 = 0 Then
            textFont = New Font(e.Font.FontFamily, e.Font.Size * 2)
        Else
            textFont = e.Font
        End If
        e.Graphics.DrawString(listBox2.Items(e.Index).ToString(), textFont, New SolidBrush(e.ForeColor), RectangleF.op_Implicit(e.Bounds))
        e.DrawFocusRectangle()
    End Sub
    Private Sub listBox2_MeasureItem(ByVal sender As Object, ByVal e As System.Windows.Forms.MeasureItemEventArgs) Handles listBox2.MeasureItem
        If e.Index Mod 2 = 0 Then
            e.ItemHeight = e.ItemHeight * 2
        End If
    End Sub
End Class

Drag and drop between two ListBox

 
Imports System.Drawing.Drawing2D
Imports System
Imports System.Drawing.Text
Imports System.Drawing
Imports System.Windows.Forms
Imports System.Math
Public Class MainClass
   Shared Sub Main()
       Dim form1 As Form = New Form1()
       Application.Run(form1)
   End Sub 
End Class
Public Class Form1
    Private m_DragSource As ListBox = Nothing
    Private Sub Form1_Load(ByVal sender As System.Object, _
     ByVal e As System.EventArgs) Handles MyBase.Load
        lstUnselected.AllowDrop = True
        lstSelected.AllowDrop = True
        " Add event handlers.
        AddHandler lstUnselected.MouseDown, AddressOf List_MouseDown
        AddHandler lstUnselected.DragOver, AddressOf List_DragOver
        AddHandler lstUnselected.DragDrop, AddressOf List_DragDrop
        AddHandler lstUnselected.DragLeave, AddressOf List_DragLeave
        AddHandler lstSelected.MouseDown, AddressOf List_MouseDown
        AddHandler lstSelected.DragOver, AddressOf List_DragOver
        AddHandler lstSelected.DragDrop, AddressOf List_DragDrop
        AddHandler lstSelected.DragLeave, AddressOf List_DragLeave
    End Sub
    Private Sub List_MouseDown(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.MouseEventArgs)
        " Select the item at this point.
        Dim this_list As ListBox = DirectCast(sender, ListBox)
        this_list.SelectedIndex = this_list.IndexFromPoint(e.X, e.Y)
        If this_list.SelectedIndex < 0 Then Exit Sub
        m_DragSource = this_list
        this_list.DoDragDrop( _
            this_list.SelectedItem.ToString, _
            DragDropEffects.Move)
        m_DragSource = Nothing
    End Sub
    " Highlight the item under the mouse.
    Private Sub List_DragOver(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.DragEventArgs)
        If m_DragSource Is Nothing Then Exit Sub
        e.Effect = DragDropEffects.Move
        Dim this_list As ListBox = DirectCast(sender, ListBox)
        Dim pt As Point = _
            this_list.PointToClient(New Point(e.X, e.Y))
        Dim drop_index As Integer = _
            this_list.IndexFromPoint(pt.X, pt.Y)
        this_list.SelectedIndex = drop_index
    End Sub
    Private Sub List_DragLeave(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim this_list As ListBox = DirectCast(sender, ListBox)
        this_list.SelectedIndex = -1
    End Sub
    " Accept the drop.
    Private Sub List_DragDrop(ByVal sender As Object, _
     ByVal e As System.Windows.Forms.DragEventArgs)
        Dim this_list As ListBox = DirectCast(sender, ListBox)
        MoveItem(e.Data.GetData(DataFormats.Text).ToString, _
            m_DragSource, this_list, e.X, e.Y)
    End Sub
    " Move the value txt from drag_source to drop_target.
    Private Sub MoveItem(ByVal txt As String, ByVal drag_source As ListBox, _
     ByVal drop_target As ListBox, ByVal X As Integer, ByVal Y As Integer)
        Dim drop_index As Integer = drop_target.SelectedIndex
        If drop_index < 0 Then
            drop_index = drop_target.Items.Add(txt)
        Else
            drop_target.Items.Insert(drop_target.SelectedIndex, txt)
        End If
        drop_target.SelectedIndex = drop_index
        If drag_source Is drop_target Then
            Dim target_index As Integer = drag_source.FindStringExact(txt)
            If target_index = drop_index Then _
                target_index = drag_source.FindStringExact(txt, target_index)
            drag_source.Items.RemoveAt(target_index)
        Else
            drag_source.Items.Remove(txt)
        End If
    End Sub
End Class

<Global.Microsoft.VisualBasic.rupilerServices.DesignerGenerated()> _
Partial Public Class Form1
    Inherits System.Windows.Forms.Form
    "Form overrides dispose to clean up the component list.
    <System.Diagnostics.DebuggerNonUserCode()> _
    Protected Overloads 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.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.Label2 = New System.Windows.Forms.Label
        Me.Label1 = New System.Windows.Forms.Label
        Me.lstSelected = New System.Windows.Forms.ListBox
        Me.lstUnselected = New System.Windows.Forms.ListBox
        Me.SuspendLayout()
        "
        "Label2
        "
        Me.Label2.Location = New System.Drawing.Point(152, 0)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(144, 16)
        Me.Label2.TabIndex = 11
        Me.Label2.Text = "Right"
        Me.Label2.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        "
        "Label1
        "
        Me.Label1.Location = New System.Drawing.Point(0, 0)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(144, 16)
        Me.Label1.TabIndex = 10
        Me.Label1.Text = "Left"
        Me.Label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter
        "
        "lstSelected
        "
        Me.lstSelected.FormattingEnabled = True
        Me.lstSelected.Items.AddRange(New Object() {"1", "2", "3", "4", "5", "6", "7", "8"})
        Me.lstSelected.Location = New System.Drawing.Point(152, 16)
        Me.lstSelected.Name = "lstSelected"
        Me.lstSelected.Size = New System.Drawing.Size(144, 264)
        Me.lstSelected.TabIndex = 9
        "
        "lstUnselected
        "
        Me.lstUnselected.FormattingEnabled = True
        Me.lstUnselected.Items.AddRange(New Object() {"A", "B", "C", "D", "E", "F", "G", "H"})
        Me.lstUnselected.Location = New System.Drawing.Point(0, 16)
        Me.lstUnselected.Name = "lstUnselected"
        Me.lstUnselected.Size = New System.Drawing.Size(144, 264)
        Me.lstUnselected.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(297, 281)
        Me.Controls.Add(Me.Label2)
        Me.Controls.Add(Me.Label1)
        Me.Controls.Add(Me.lstSelected)
        Me.Controls.Add(Me.lstUnselected)
        Me.Name = "Form1"
        Me.Text = "DragBetweenListBoxes"
        Me.ResumeLayout(False)
    End Sub
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents Label1 As System.Windows.Forms.Label
    Friend WithEvents lstSelected As System.Windows.Forms.ListBox
    Friend WithEvents lstUnselected As System.Windows.Forms.ListBox
End Class

Draw selected Item in ListBox

 
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Public Class MainClass

   Public Shared Sub Main()
         Application.Run(New OwnerDrawnFixedListBox())
   End Sub
   
   
End Class
Public Class OwnerDrawnFixedListBox
    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
    "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.
    Friend WithEvents listBox1 As System.Windows.Forms.ListBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.listBox1 = New System.Windows.Forms.ListBox()
        Me.SuspendLayout()
        "
        "listBox1
        "
        Me.listBox1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawFixed
        Me.listBox1.Font = New System.Drawing.Font("Microsoft Sans Serif", 11.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.listBox1.ItemHeight = 18
        Me.listBox1.Items.AddRange(New Object() {"A", "B", "C"})
        Me.listBox1.Location = New System.Drawing.Point(8, 16)
        Me.listBox1.Name = "listBox1"
        Me.listBox1.Size = New System.Drawing.Size(248, 166)
        Me.listBox1.TabIndex = 3
        "
        "OwnerDrawnFixedListBox
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(264, 198)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.listBox1})
        Me.Name = "OwnerDrawnFixedListBox"
        Me.Text = "OwnerDrawnFixedListBox"
        Me.ResumeLayout(False)
    End Sub
#End Region
    Private Sub listBox1_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles listBox1.DrawItem
        e.DrawBackground()
        Dim drawFont As Font = Nothing
        If e.State And DrawItemState.Selected = DrawItemState.Selected Then
            drawFont = New Font("Times New Roman", 14, FontStyle.Bold Or FontStyle.Italic)
        Else
            drawFont = e.Font
        End If
        e.Graphics.DrawString(listBox1.Items(e.Index).ToString(), _
                                drawFont, _
                                New SolidBrush(e.ForeColor), e.Bounds.X, e.Bounds.Y)
        e.DrawFocusRectangle()
    End Sub
End Class

Enum Binding

  
Imports System.Windows.Forms
Public Class Form1
    Inherits System.Windows.Forms.Form
    Public Sub New()
        MyBase.New()
        InitializeComponent()
    End Sub
    Friend WithEvents Button1 As System.Windows.Forms.Button
    Friend WithEvents ListBox1 As System.Windows.Forms.ListBox
    Friend WithEvents Button2 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.ListBox1 = New System.Windows.Forms.ListBox()
        Me.Button2 = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        "
        Me.Button1.Location = New System.Drawing.Point(104, 24)
        Me.Button1.Size = New System.Drawing.Size(184, 24)
        Me.Button1.Text = "Bind to Enum"
        "
        Me.ListBox1.Location = New System.Drawing.Point(104, 112)
        Me.ListBox1.Size = New System.Drawing.Size(184, 82)
        "
        Me.Button2.Location = New System.Drawing.Point(104, 64)
        Me.Button2.Size = New System.Drawing.Size(184, 24)
        Me.Button2.Text = "Display Value of Selected"
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(392, 246)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button2, Me.ListBox1, Me.Button1})
        Me.ResumeLayout(False)
    End Sub
    Public Enum Test
        A = 1
        B = 2
        C = 3
    End Enum
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        ListBox1.DataSource = System.Enum.GetNames(GetType(Test))
    End Sub
    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        Dim strNames As Array = System.Enum.GetValues(GetType(Test))
        Dim strValue As String = strNames(ListBox1.SelectedIndex)
        MessageBox.Show(strValue)
    End Sub
End Class

Get Selected Item from ListBox

 
Imports System.Windows.Forms
Imports System.Drawing
Imports System.IO

Module Module1
    Sub Main()
        Application.Run(New Form1)
    End Sub
End Module


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
    "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.
    Friend WithEvents ListBox1 As System.Windows.Forms.ListBox
    Friend WithEvents Button1 As System.Windows.Forms.Button
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.ListBox1 = New System.Windows.Forms.ListBox()
        Me.Button1 = New System.Windows.Forms.Button()
        Me.SuspendLayout()
        "
        "ListBox1
        "
        Me.ListBox1.Items.AddRange(New Object() {"Windows", "Linux", "Mac OS", "Palm OS", "Windows CE", "Unix"})
        Me.ListBox1.Location = New System.Drawing.Point(32, 32)
        Me.ListBox1.Name = "ListBox1"
        Me.ListBox1.Size = New System.Drawing.Size(120, 69)
        Me.ListBox1.TabIndex = 0
        "
        "Button1
        "
        Me.Button1.Location = New System.Drawing.Point(104, 144)
        Me.Button1.Name = "Button1"
        Me.Button1.TabIndex = 1
        Me.Button1.Text = "Done"
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(280, 205)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button1, Me.ListBox1})
        Me.Name = "Form1"
        Me.Text = "ListBoxDemo"
        Me.ResumeLayout(False)
    End Sub
#End Region
    Private Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
        If (ListBox1.SelectedItem <> "") Then
            MessageBox.Show("You selected: " & ListBox1.SelectedItem)
        Else
            MessageBox.Show("You must select an item")
        End If
    End Sub
End Class

Owner Draw ListBox

 
Imports System
Imports System.Drawing
Imports System.Windows.Forms

Public Class MainClass

   Public Shared Sub Main()
         Application.Run(New OwnerDrawnVariableListBox())
   End Sub
   
   
End Class
Public Class OwnerDrawnVariableListBox
    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
    "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.
    Friend WithEvents listBox2 As System.Windows.Forms.ListBox
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.listBox2 = New System.Windows.Forms.ListBox()
        Me.SuspendLayout()
        "
        "listBox2
        "
        Me.listBox2.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable
        Me.listBox2.Items.AddRange(New Object() {"A", "a", "B"})
        Me.listBox2.Location = New System.Drawing.Point(6, 15)
        Me.listBox2.Name = "listBox2"
        Me.listBox2.Size = New System.Drawing.Size(280, 192)
        Me.listBox2.TabIndex = 5
        "
        "OwnerDrawnVariableListBox
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
        Me.ClientSize = New System.Drawing.Size(292, 222)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.listBox2})
        Me.Name = "OwnerDrawnVariableListBox"
        Me.Text = "OwnerDrawnVariableListBox"
        Me.ResumeLayout(False)
    End Sub
#End Region
    Private Sub listBox2_DrawItem(ByVal sender As Object, ByVal e As System.Windows.Forms.DrawItemEventArgs) Handles listBox2.DrawItem
        e.DrawBackground()
        Dim textFont As Font
        textFont = New Font(e.Font.FontFamily, e.Font.Size * 2)
        e.Graphics.DrawString(listBox2.Items(e.Index).ToString(), _
                                textFont, _
                                New SolidBrush(e.ForeColor), _
                                e.Bounds.X, e.Bounds.Y)
        e.DrawFocusRectangle()
    End Sub
    Private Sub listBox2_MeasureItem(ByVal sender As Object, ByVal e As System.Windows.Forms.MeasureItemEventArgs) Handles listBox2.MeasureItem
        If e.Index Mod 2 = 0 Then e.ItemHeight *= 2
    End Sub
End Class

Set ListBox TopIndex

 
Imports System
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 Label1 As System.Windows.Forms.Label
    Friend WithEvents Label2 As System.Windows.Forms.Label
    Friend WithEvents txt As System.Windows.Forms.TextBox
    Friend WithEvents pic As System.Windows.Forms.PictureBox
    Friend WithEvents lstLog As System.Windows.Forms.ListBox
    Friend WithEvents cmd As System.Windows.Forms.Button
    Friend WithEvents Label3 As System.Windows.Forms.Label
    "Required by the Windows Form Designer
    Private components As System.ruponentModel.Container
    "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.
    Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
    Friend WithEvents Label4 As System.Windows.Forms.Label
    <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
        Me.txt = New System.Windows.Forms.TextBox()
        Me.Label1 = New System.Windows.Forms.Label()
        Me.Label2 = New System.Windows.Forms.Label()
        Me.lstLog = New System.Windows.Forms.ListBox()
        Me.pic = New System.Windows.Forms.PictureBox()
        Me.cmd = New System.Windows.Forms.Button()
        Me.Label3 = New System.Windows.Forms.Label()
        Me.GroupBox1 = New System.Windows.Forms.GroupBox()
        Me.Label4 = New System.Windows.Forms.Label()
        Me.GroupBox1.SuspendLayout()
        Me.SuspendLayout()
        "
        "txt
        "
        Me.txt.Location = New System.Drawing.Point(156, 20)
        Me.txt.Name = "txt"
        Me.txt.Size = New System.Drawing.Size(192, 21)
        Me.txt.TabIndex = 1
        Me.txt.Text = ""
        "
        "Label1
        "
        Me.Label1.Location = New System.Drawing.Point(6, 24)
        Me.Label1.Name = "Label1"
        Me.Label1.Size = New System.Drawing.Size(144, 16)
        Me.Label1.TabIndex = 2
        Me.Label1.Text = "Test keyboard events here:"
        "
        "Label2
        "
        Me.Label2.Location = New System.Drawing.Point(20, 52)
        Me.Label2.Name = "Label2"
        Me.Label2.Size = New System.Drawing.Size(128, 16)
        Me.Label2.TabIndex = 2
        Me.Label2.Text = "Test mouse events here:"
        "
        "lstLog
        "
        Me.lstLog.Anchor = (((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Bottom) _
                    Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right)
        Me.lstLog.IntegralHeight = False
        Me.lstLog.Location = New System.Drawing.Point(8, 160)
        Me.lstLog.Name = "lstLog"
        Me.lstLog.Size = New System.Drawing.Size(384, 212)
        Me.lstLog.TabIndex = 0
        "
        "pic
        "
        Me.pic.BorderStyle = System.Windows.Forms.BorderStyle.Fixed3D
        Me.pic.Location = New System.Drawing.Point(156, 48)
        Me.pic.Name = "pic"
        Me.pic.Size = New System.Drawing.Size(192, 48)
        Me.pic.TabIndex = 3
        Me.pic.TabStop = False
        "
        "cmd
        "
        Me.cmd.FlatStyle = System.Windows.Forms.FlatStyle.System
        Me.cmd.Location = New System.Drawing.Point(156, 100)
        Me.cmd.Name = "cmd"
        Me.cmd.Size = New System.Drawing.Size(88, 28)
        Me.cmd.TabIndex = 4
        Me.cmd.Text = "Button1"
        "
        "Label3
        "
        Me.Label3.Location = New System.Drawing.Point(24, 104)
        Me.Label3.Name = "Label3"
        Me.Label3.Size = New System.Drawing.Size(64, 24)
        Me.Label3.TabIndex = 5
        Me.Label3.Text = "Label3"
        "
        "GroupBox1
        "
        Me.GroupBox1.Anchor = ((System.Windows.Forms.AnchorStyles.Top Or System.Windows.Forms.AnchorStyles.Left) _
                    Or System.Windows.Forms.AnchorStyles.Right)
        Me.GroupBox1.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label4, Me.Label1, Me.pic, Me.txt, Me.cmd, Me.Label2})
        Me.GroupBox1.FlatStyle = System.Windows.Forms.FlatStyle.System
        Me.GroupBox1.Location = New System.Drawing.Point(8, 4)
        Me.GroupBox1.Name = "GroupBox1"
        Me.GroupBox1.Size = New System.Drawing.Size(384, 148)
        Me.GroupBox1.TabIndex = 6
        Me.GroupBox1.TabStop = False
        "
        "Label4
        "
        Me.Label4.Location = New System.Drawing.Point(92, 108)
        Me.Label4.Name = "Label4"
        Me.Label4.Size = New System.Drawing.Size(56, 16)
        Me.Label4.TabIndex = 5
        Me.Label4.Text = "And here:"
        "
        "Form1
        "
        Me.AutoScaleBaseSize = New System.Drawing.Size(5, 14)
        Me.ClientSize = New System.Drawing.Size(400, 378)
        Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.GroupBox1, Me.Label3, Me.lstLog})
        Me.Font = New System.Drawing.Font("Tahoma", 8.25!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
        Me.Name = "Form1"
        Me.Text = "Event Tracker"
        Me.GroupBox1.ResumeLayout(False)
        Me.ResumeLayout(False)
    End Sub
#End Region

    Private Sub pic_MouseEnter(ByVal sender As Object, ByVal e As System.EventArgs) Handles pic.MouseEnter, cmd.MouseEnter
        Log("Mouse Enter")
    End Sub
    Private Sub pic_MouseMove(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles pic.MouseMove
        log("Mouse Move: " )
    End Sub
    Private Sub Log(ByVal data As String)
        lstLog.Items.Add(data)
        Dim ItemsPerPage As Integer = lstLog.Height \ lstLog.ItemHeight
        lstLog.TopIndex = lstLog.Items.Count - ItemsPerPage
    End Sub
End Class

Toggling list box Selection Mode: select one or select more than one

 
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