VB.Net Tutorial/GUI/MessageBox

Create MessageBox dynamically

Imports System.Windows.Forms
public class MessageBoxCreateDy
   public Shared Sub Main
        Application.Run(New frmMessageBox)
   End Sub
End class
Public Class frmMessageBox
   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 grpPromptandTitle As System.Windows.Forms.GroupBox
   Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
   Friend WithEvents btnShow As System.Windows.Forms.Button
   Friend WithEvents Panel1 As System.Windows.Forms.Panel
   Friend WithEvents Splitter1 As System.Windows.Forms.Splitter
   Friend WithEvents Panel2 As System.Windows.Forms.Panel
   Friend WithEvents Label1 As System.Windows.Forms.Label
   Friend WithEvents txtText As System.Windows.Forms.TextBox
   Friend WithEvents txtCaption As System.Windows.Forms.TextBox
   Friend WithEvents Label2 As System.Windows.Forms.Label
   Friend WithEvents rdoOKOnly As System.Windows.Forms.RadioButton
   Friend WithEvents Label3 As System.Windows.Forms.Label
   Friend WithEvents rdoAbRetry As System.Windows.Forms.RadioButton
   Friend WithEvents rdoError As System.Windows.Forms.RadioButton
   Friend WithEvents rdoExclamation As System.Windows.Forms.RadioButton
   Friend WithEvents rdoRetryCancel As System.Windows.Forms.RadioButton
   Friend WithEvents rdoInformation As System.Windows.Forms.RadioButton
   Friend WithEvents rdoYesNo As System.Windows.Forms.RadioButton
   Friend WithEvents rdoYesNoCancel As System.Windows.Forms.RadioButton
   Friend WithEvents rdoOKCancel As System.Windows.Forms.RadioButton
   Friend WithEvents Label4 As System.Windows.Forms.Label
   Friend WithEvents rdoNoIcon As System.Windows.Forms.RadioButton
   Friend WithEvents rdoQuestion As System.Windows.Forms.RadioButton
   "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.grpPromptandTitle = New System.Windows.Forms.GroupBox()
      Me.GroupBox1 = New System.Windows.Forms.GroupBox()
      Me.btnShow = New System.Windows.Forms.Button()
      Me.Panel1 = New System.Windows.Forms.Panel()
      Me.Splitter1 = New System.Windows.Forms.Splitter()
      Me.Panel2 = New System.Windows.Forms.Panel()
      Me.Label1 = New System.Windows.Forms.Label()
      Me.txtText = New System.Windows.Forms.TextBox()
      Me.txtCaption = New System.Windows.Forms.TextBox()
      Me.Label2 = New System.Windows.Forms.Label()
      Me.rdoOKOnly = New System.Windows.Forms.RadioButton()
      Me.Label3 = New System.Windows.Forms.Label()
      Me.rdoAbRetry = New System.Windows.Forms.RadioButton()
      Me.rdoError = New System.Windows.Forms.RadioButton()
      Me.rdoExclamation = New System.Windows.Forms.RadioButton()
      Me.rdoRetryCancel = New System.Windows.Forms.RadioButton()
      Me.rdoInformation = New System.Windows.Forms.RadioButton()
      Me.rdoYesNo = New System.Windows.Forms.RadioButton()
      Me.rdoYesNoCancel = New System.Windows.Forms.RadioButton()
      Me.rdoOKCancel = New System.Windows.Forms.RadioButton()
      Me.Label4 = New System.Windows.Forms.Label()
      Me.rdoNoIcon = New System.Windows.Forms.RadioButton()
      Me.rdoQuestion = New System.Windows.Forms.RadioButton()
      Me.grpPromptandTitle.SuspendLayout()
      Me.GroupBox1.SuspendLayout()
      Me.Panel1.SuspendLayout()
      Me.Panel2.SuspendLayout()
      Me.SuspendLayout()
      "
      "grpPromptandTitle
      "
      Me.grpPromptandTitle.Controls.AddRange(New System.Windows.Forms.Control() {Me.txtCaption, Me.Label2, Me.txtText, Me.Label1})
      Me.grpPromptandTitle.Dock = System.Windows.Forms.DockStyle.Top
      Me.grpPromptandTitle.Name = "grpPromptandTitle"
      Me.grpPromptandTitle.Size = New System.Drawing.Size(456, 112)
      Me.grpPromptandTitle.TabIndex = 0
      Me.grpPromptandTitle.TabStop = False
      Me.grpPromptandTitle.Text = "Enter your text and caption:"
      "
      "GroupBox1
      "
      Me.GroupBox1.Controls.AddRange(New System.Windows.Forms.Control() {Me.btnShow})
      Me.GroupBox1.Dock = System.Windows.Forms.DockStyle.Bottom
      Me.GroupBox1.Location = New System.Drawing.Point(0, 350)
      Me.GroupBox1.Name = "GroupBox1"
      Me.GroupBox1.Size = New System.Drawing.Size(456, 48)
      Me.GroupBox1.TabIndex = 3
      Me.GroupBox1.TabStop = False
      "
      "btnShow
      "
      Me.btnShow.Location = New System.Drawing.Point(328, 16)
      Me.btnShow.Name = "btnShow"
      Me.btnShow.Size = New System.Drawing.Size(96, 24)
      Me.btnShow.TabIndex = 0
      Me.btnShow.Text = "SHOW"
      "
      "Panel1
      "
      Me.Panel1.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label3, Me.rdoRetryCancel, Me.rdoYesNo, Me.rdoYesNoCancel, Me.rdoAbRetry, Me.rdoOKCancel, Me.rdoOKOnly})
      Me.Panel1.Dock = System.Windows.Forms.DockStyle.Left
      Me.Panel1.Location = New System.Drawing.Point(0, 112)
      Me.Panel1.Name = "Panel1"
      Me.Panel1.Size = New System.Drawing.Size(200, 238)
      Me.Panel1.TabIndex = 1
      "
      "Splitter1
      "
      Me.Splitter1.Location = New System.Drawing.Point(200, 112)
      Me.Splitter1.Name = "Splitter1"
      Me.Splitter1.Size = New System.Drawing.Size(3, 238)
      Me.Splitter1.TabIndex = 3
      Me.Splitter1.TabStop = False
      "
      "Panel2
      "
      Me.Panel2.Controls.AddRange(New System.Windows.Forms.Control() {Me.Label4, Me.rdoExclamation, Me.rdoNoIcon, Me.rdoInformation, Me.rdoQuestion, Me.rdoError})
      Me.Panel2.Dock = System.Windows.Forms.DockStyle.Fill
      Me.Panel2.Location = New System.Drawing.Point(203, 112)
      Me.Panel2.Name = "Panel2"
      Me.Panel2.Size = New System.Drawing.Size(253, 238)
      Me.Panel2.TabIndex = 2
      "
      "Label1
      "
      Me.Label1.Location = New System.Drawing.Point(16, 24)
      Me.Label1.Name = "Label1"
      Me.Label1.Size = New System.Drawing.Size(64, 24)
      Me.Label1.TabIndex = 0
      Me.Label1.Text = "Text:"
      "
      "txtText
      "
      Me.txtText.Location = New System.Drawing.Point(104, 24)
      Me.txtText.Name = "txtText"
      Me.txtText.Size = New System.Drawing.Size(320, 20)
      Me.txtText.TabIndex = 0
      Me.txtText.Text = ""
      "
      "txtCaption
      "
      Me.txtCaption.Location = New System.Drawing.Point(104, 64)
      Me.txtCaption.Name = "txtCaption"
      Me.txtCaption.Size = New System.Drawing.Size(320, 20)
      Me.txtCaption.TabIndex = 1
      Me.txtCaption.Text = ""
      "
      "Label2
      "
      Me.Label2.Location = New System.Drawing.Point(16, 64)
      Me.Label2.Name = "Label2"
      Me.Label2.Size = New System.Drawing.Size(64, 24)
      Me.Label2.TabIndex = 0
      Me.Label2.Text = "Caption:"
      "
      "rdoOKOnly
      "
      Me.rdoOKOnly.Checked = True
      Me.rdoOKOnly.Location = New System.Drawing.Point(8, 40)
      Me.rdoOKOnly.Name = "rdoOKOnly"
      Me.rdoOKOnly.Size = New System.Drawing.Size(160, 24)
      Me.rdoOKOnly.TabIndex = 2
      Me.rdoOKOnly.TabStop = True
      Me.rdoOKOnly.Text = "Ok Only"
      "
      "Label3
      "
      Me.Label3.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
      Me.Label3.Location = New System.Drawing.Point(24, 8)
      Me.Label3.Name = "Label3"
      Me.Label3.Size = New System.Drawing.Size(104, 24)
      Me.Label3.TabIndex = 0
      Me.Label3.Text = "Buttons"
      "
      "rdoAbRetry
      "
      Me.rdoAbRetry.Location = New System.Drawing.Point(8, 104)
      Me.rdoAbRetry.Name = "rdoAbRetry"
      Me.rdoAbRetry.Size = New System.Drawing.Size(160, 24)
      Me.rdoAbRetry.TabIndex = 4
      Me.rdoAbRetry.Text = "Abort, Retry, Ignore"
      "
      "rdoError
      "
      Me.rdoError.Checked = True
      Me.rdoError.Location = New System.Drawing.Point(24, 40)
      Me.rdoError.Name = "rdoError"
      Me.rdoError.Size = New System.Drawing.Size(88, 32)
      Me.rdoError.TabIndex = 1
      Me.rdoError.TabStop = True
      Me.rdoError.Text = "Error"
      "
      "rdoExclamation
      "
      Me.rdoExclamation.Location = New System.Drawing.Point(24, 112)
      Me.rdoExclamation.Name = "rdoExclamation"
      Me.rdoExclamation.Size = New System.Drawing.Size(88, 32)
      Me.rdoExclamation.TabIndex = 3
      Me.rdoExclamation.Text = "Exclamation"
      "
      "rdoRetryCancel
      "
      Me.rdoRetryCancel.Location = New System.Drawing.Point(8, 200)
      Me.rdoRetryCancel.Name = "rdoRetryCancel"
      Me.rdoRetryCancel.Size = New System.Drawing.Size(160, 24)
      Me.rdoRetryCancel.TabIndex = 0
      Me.rdoRetryCancel.Text = "Retry and Cancel"
      "
      "rdoInformation
      "
      Me.rdoInformation.Location = New System.Drawing.Point(136, 40)
      Me.rdoInformation.Name = "rdoInformation"
      Me.rdoInformation.Size = New System.Drawing.Size(88, 32)
      Me.rdoInformation.TabIndex = 4
      Me.rdoInformation.Text = "Information"
      "
      "rdoYesNo
      "
      Me.rdoYesNo.Location = New System.Drawing.Point(8, 168)
      Me.rdoYesNo.Name = "rdoYesNo"
      Me.rdoYesNo.Size = New System.Drawing.Size(160, 24)
      Me.rdoYesNo.TabIndex = 6
      Me.rdoYesNo.Text = "Yes and No"
      "
      "rdoYesNoCancel
      "
      Me.rdoYesNoCancel.Location = New System.Drawing.Point(8, 136)
      Me.rdoYesNoCancel.Name = "rdoYesNoCancel"
      Me.rdoYesNoCancel.Size = New System.Drawing.Size(160, 24)
      Me.rdoYesNoCancel.TabIndex = 5
      Me.rdoYesNoCancel.Text = "Yes, No, Cancel"
      "
      "rdoOKCancel
      "
      Me.rdoOKCancel.Location = New System.Drawing.Point(8, 72)
      Me.rdoOKCancel.Name = "rdoOKCancel"
      Me.rdoOKCancel.Size = New System.Drawing.Size(160, 24)
      Me.rdoOKCancel.TabIndex = 3
      Me.rdoOKCancel.Text = "Ok and  Cancel"
      "
      "Label4
      "
      Me.Label4.Font = New System.Drawing.Font("Microsoft Sans Serif", 8.25!, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
      Me.Label4.Location = New System.Drawing.Point(24, 8)
      Me.Label4.Name = "Label4"
      Me.Label4.Size = New System.Drawing.Size(80, 24)
      Me.Label4.TabIndex = 0
      Me.Label4.Text = "Icon"
      "
      "rdoNoIcon
      "
      Me.rdoNoIcon.Location = New System.Drawing.Point(136, 80)
      Me.rdoNoIcon.Name = "rdoNoIcon"
      Me.rdoNoIcon.Size = New System.Drawing.Size(88, 32)
      Me.rdoNoIcon.TabIndex = 5
      Me.rdoNoIcon.Text = "No Icon"
      "
      "rdoQuestion
      "
      Me.rdoQuestion.Location = New System.Drawing.Point(24, 80)
      Me.rdoQuestion.Name = "rdoQuestion"
      Me.rdoQuestion.Size = New System.Drawing.Size(88, 32)
      Me.rdoQuestion.TabIndex = 2
      Me.rdoQuestion.Text = "Question"
      "
      "frmMessageBox
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(456, 398)
      Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.Panel2, Me.Splitter1, Me.Panel1, Me.GroupBox1, Me.grpPromptandTitle})
      Me.Name = "frmMessageBox"
      Me.Text = "Do the Message Box thing!"
      Me.grpPromptandTitle.ResumeLayout(False)
      Me.GroupBox1.ResumeLayout(False)
      Me.Panel1.ResumeLayout(False)
      Me.Panel2.ResumeLayout(False)
      Me.ResumeLayout(False)
   End Sub
#End Region

   Private Sub btnShow_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnShow.Click
      Dim buttonchoice As MessageBoxButtons
      Dim iconchoice As MessageBoxIcon
      Dim answer As DialogResult
      If rdoOKOnly.Checked = True Then
         buttonchoice = MessageBoxButtons.OK 
      ElseIf rdoOKCancel.Checked = True Then
         buttonchoice = MessageBoxButtons.OKCancel 
      ElseIf rdoAbRetry.Checked = True Then
         buttonchoice = MessageBoxButtons.AbortRetryIgnore
      ElseIf rdoYesNoCancel.Checked = True Then
         buttonchoice = MessageBoxButtons.YesNoCancel  
      ElseIf rdoYesNo.Checked = True Then
         buttonchoice = MessageBoxButtons.YesNo  
      ElseIf rdoRetryCancel.Checked = True Then
         buttonchoice = MessageBoxButtons.RetryCancel  
      Else
         MessageBox.Show("Unexpected error in button selection!")
      End If
      If rdoError.Checked = True Then
         iconchoice = MessageBoxIcon.Error   
      ElseIf rdoQuestion.Checked = True Then
         iconchoice = MessageBoxIcon.Question
      ElseIf rdoExclamation.Checked = True Then
         iconchoice = MessageBoxIcon.Exclamation   
      ElseIf rdoInformation.Checked = True Then
         iconchoice = MessageBoxIcon.Information   
      ElseIf rdoNoIcon.Checked = True Then
         iconchoice = MessageBoxIcon.None
      Else
         MessageBox.Show("Unexpected error in icon selection!")
      End If
      answer = MessageBox.Show(txtText.Text, txtCaption.Text, _
         buttonchoice, iconchoice)
      Dim evaluate As String
      If answer = DialogResult.OK Then
         evaluate = "You clicked OK!"
      ElseIf answer = DialogResult.Cancel Then
         evaluate = "You clicked Cancel!"
      ElseIf answer = DialogResult.Abort Then
         evaluate = "You clicked Abort!"
      ElseIf answer = DialogResult.Retry Then
         evaluate = "You clicked Retry!"
      ElseIf answer = DialogResult.Ignore Then
         evaluate = "You clicked Ignore!"
      ElseIf answer = DialogResult.Yes Then
         evaluate = "You clicked Yes!"
      ElseIf answer = DialogResult.No Then
         evaluate = "You clicked No!"
      Else
         evaluate = "Nothing was clicked!"
      End If
      MessageBox.Show(evaluate, "Message Box Evaluation", _
         MessageBoxButtons.OK, MessageBoxIcon.Information)
   End Sub
End Class

Custom your MessageBox

Imports System.IO
Imports System.Text.Encoding
Imports System.Drawing
Imports System.Drawing.Printing
Imports System.Windows.Forms
public class CustomMessageBox
   public Shared Sub Main
        Application.Run(New Form1)
   End Sub
End class

Public Class Form1
  Inherits System.Windows.Forms.Form
  Public Sub New()
    MyBase.New()
    InitializeComponent()
  End Sub
  Private components As System.ruponentModel.IContainer
  Friend WithEvents Label1 As System.Windows.Forms.Label
  Friend WithEvents btnShow As System.Windows.Forms.Button
  Friend WithEvents txtMsg As System.Windows.Forms.TextBox
  Friend WithEvents txtCaption As System.Windows.Forms.TextBox
  Friend WithEvents Label2 As System.Windows.Forms.Label
  Friend WithEvents grpDefaultButton As System.Windows.Forms.GroupBox
  Friend WithEvents DefaultButton3 As System.Windows.Forms.RadioButton
  Friend WithEvents DefaultButton2 As System.Windows.Forms.RadioButton
  Friend WithEvents DefaultButton1 As System.Windows.Forms.RadioButton
  Friend WithEvents GroupBox2 As System.Windows.Forms.GroupBox
  Friend WithEvents Button6 As System.Windows.Forms.RadioButton
  Friend WithEvents Button5 As System.Windows.Forms.RadioButton
  Friend WithEvents Button4 As System.Windows.Forms.RadioButton
  Friend WithEvents Button3 As System.Windows.Forms.RadioButton
  Friend WithEvents Button2 As System.Windows.Forms.RadioButton
  Friend WithEvents Button1 As System.Windows.Forms.RadioButton
  Friend WithEvents GroupBox1 As System.Windows.Forms.GroupBox
  Friend WithEvents txtResult As System.Windows.Forms.TextBox
  Friend WithEvents lblResult As System.Windows.Forms.Label
  Friend WithEvents Icon8 As System.Windows.Forms.RadioButton
  Friend WithEvents Icon7 As System.Windows.Forms.RadioButton
  Friend WithEvents Icon6 As System.Windows.Forms.RadioButton
  Friend WithEvents Icon5 As System.Windows.Forms.RadioButton
  Friend WithEvents Icon4 As System.Windows.Forms.RadioButton
  Friend WithEvents Icon3 As System.Windows.Forms.RadioButton
  Friend WithEvents Icon2 As System.Windows.Forms.RadioButton
  Friend WithEvents Icon1 As System.Windows.Forms.RadioButton
  <System.Diagnostics.DebuggerStepThrough()> Private Sub InitializeComponent()
    Me.txtMsg = New System.Windows.Forms.TextBox()
    Me.Label1 = New System.Windows.Forms.Label()
    Me.btnShow = New System.Windows.Forms.Button()
    Me.txtCaption = New System.Windows.Forms.TextBox()
    Me.Label2 = New System.Windows.Forms.Label()
    Me.grpDefaultButton = New System.Windows.Forms.GroupBox()
    Me.DefaultButton3 = New System.Windows.Forms.RadioButton()
    Me.DefaultButton2 = New System.Windows.Forms.RadioButton()
    Me.DefaultButton1 = New System.Windows.Forms.RadioButton()
    Me.GroupBox2 = New System.Windows.Forms.GroupBox()
    Me.Button6 = New System.Windows.Forms.RadioButton()
    Me.Button5 = New System.Windows.Forms.RadioButton()
    Me.Button4 = New System.Windows.Forms.RadioButton()
    Me.Button3 = New System.Windows.Forms.RadioButton()
    Me.Button2 = New System.Windows.Forms.RadioButton()
    Me.Button1 = New System.Windows.Forms.RadioButton()
    Me.GroupBox1 = New System.Windows.Forms.GroupBox()
    Me.Icon8 = New System.Windows.Forms.RadioButton()
    Me.Icon7 = New System.Windows.Forms.RadioButton()
    Me.Icon6 = New System.Windows.Forms.RadioButton()
    Me.Icon5 = New System.Windows.Forms.RadioButton()
    Me.Icon4 = New System.Windows.Forms.RadioButton()
    Me.Icon3 = New System.Windows.Forms.RadioButton()
    Me.Icon2 = New System.Windows.Forms.RadioButton()
    Me.Icon1 = New System.Windows.Forms.RadioButton()
    Me.txtResult = New System.Windows.Forms.TextBox()
    Me.lblResult = New System.Windows.Forms.Label()
    Me.grpDefaultButton.SuspendLayout()
    Me.GroupBox2.SuspendLayout()
    Me.GroupBox1.SuspendLayout()
    Me.SuspendLayout()
    "
    "txtMsg
    "
    Me.txtMsg.Location = New System.Drawing.Point(68, 8)
    Me.txtMsg.Name = "txtMsg"
    Me.txtMsg.Size = New System.Drawing.Size(200, 22)
    Me.txtMsg.TabIndex = 0
    Me.txtMsg.Text = ""
    "
    "Label1
    "
    Me.Label1.Location = New System.Drawing.Point(12, 12)
    Me.Label1.Name = "Label1"
    Me.Label1.Size = New System.Drawing.Size(60, 16)
    Me.Label1.TabIndex = 13
    Me.Label1.Text = "Message:"
    "
    "btnShow
    "
    Me.btnShow.Location = New System.Drawing.Point(280, 8)
    Me.btnShow.Name = "btnShow"
    Me.btnShow.Size = New System.Drawing.Size(76, 24)
    Me.btnShow.TabIndex = 5
    Me.btnShow.Text = "Show"
    "
    "txtCaption
    "
    Me.txtCaption.Location = New System.Drawing.Point(68, 36)
    Me.txtCaption.Name = "txtCaption"
    Me.txtCaption.Size = New System.Drawing.Size(200, 22)
    Me.txtCaption.TabIndex = 1
    Me.txtCaption.Text = ""
    "
    "Label2
    "
    Me.Label2.Location = New System.Drawing.Point(12, 40)
    Me.Label2.Name = "Label2"
    Me.Label2.Size = New System.Drawing.Size(60, 16)
    Me.Label2.TabIndex = 16
    Me.Label2.Text = "Caption:"
    "
    "grpDefaultButton
    "
    Me.grpDefaultButton.Controls.AddRange(New System.Windows.Forms.Control() {Me.DefaultButton3, Me.DefaultButton2, Me.DefaultButton1})
    Me.grpDefaultButton.Location = New System.Drawing.Point(208, 72)
    Me.grpDefaultButton.Name = "grpDefaultButton"
    Me.grpDefaultButton.Size = New System.Drawing.Size(144, 124)
    Me.grpDefaultButton.TabIndex = 4
    Me.grpDefaultButton.TabStop = False
    Me.grpDefaultButton.Text = "Default Button"
    "
    "DefaultButton3
    "
    Me.DefaultButton3.Location = New System.Drawing.Point(12, 68)
    Me.DefaultButton3.Name = "DefaultButton3"
    Me.DefaultButton3.Size = New System.Drawing.Size(100, 20)
    Me.DefaultButton3.TabIndex = 2
    Me.DefaultButton3.Text = "DefaultButton3"
    "
    "DefaultButton2
    "
    Me.DefaultButton2.Location = New System.Drawing.Point(12, 44)
    Me.DefaultButton2.Name = "DefaultButton2"
    Me.DefaultButton2.Size = New System.Drawing.Size(100, 20)
    Me.DefaultButton2.TabIndex = 1
    Me.DefaultButton2.Text = "DefaultButton2"
    "
    "DefaultButton1
    "
    Me.DefaultButton1.Checked = True
    Me.DefaultButton1.Location = New System.Drawing.Point(12, 20)
    Me.DefaultButton1.Name = "DefaultButton1"
    Me.DefaultButton1.Size = New System.Drawing.Size(100, 20)
    Me.DefaultButton1.TabIndex = 0
    Me.DefaultButton1.TabStop = True
    Me.DefaultButton1.Text = "DefaultButton1"
    "
    "GroupBox2
    "
    Me.GroupBox2.Controls.AddRange(New System.Windows.Forms.Control() {Me.Button6, Me.Button5, Me.Button4, Me.Button3, Me.Button2, Me.Button1})
    Me.GroupBox2.Location = New System.Drawing.Point(12, 200)
    Me.GroupBox2.Name = "GroupBox2"
    Me.GroupBox2.Size = New System.Drawing.Size(188, 160)
    Me.GroupBox2.TabIndex = 3
    Me.GroupBox2.TabStop = False
    Me.GroupBox2.Text = "Buttons"
    "
    "Button6
    "
    Me.Button6.Location = New System.Drawing.Point(12, 133)
    Me.Button6.Name = "Button6"
    Me.Button6.Size = New System.Drawing.Size(100, 19)
    Me.Button6.TabIndex = 5
    Me.Button6.Text = "YesNoCancel"
    "
    "Button5
    "
    Me.Button5.Checked = True
    Me.Button5.Location = New System.Drawing.Point(12, 110)
    Me.Button5.Name = "Button5"
    Me.Button5.Size = New System.Drawing.Size(100, 20)
    Me.Button5.TabIndex = 4
    Me.Button5.TabStop = True
    Me.Button5.Text = "YesNo"
    "
    "Button4
    "
    Me.Button4.Location = New System.Drawing.Point(12, 86)
    Me.Button4.Name = "Button4"
    Me.Button4.Size = New System.Drawing.Size(100, 21)
    Me.Button4.TabIndex = 3
    Me.Button4.Text = "RetryCancel"
    "
    "Button3
    "
    Me.Button3.Location = New System.Drawing.Point(12, 65)
    Me.Button3.Name = "Button3"
    Me.Button3.Size = New System.Drawing.Size(100, 18)
    Me.Button3.TabIndex = 2
    Me.Button3.Text = "OKCancel"
    "
    "Button2
    "
    Me.Button2.Location = New System.Drawing.Point(12, 43)
    Me.Button2.Name = "Button2"
    Me.Button2.Size = New System.Drawing.Size(100, 19)
    Me.Button2.TabIndex = 1
    Me.Button2.Text = "OK"
    "
    "Button1
    "
    Me.Button1.Location = New System.Drawing.Point(12, 20)
    Me.Button1.Name = "Button1"
    Me.Button1.Size = New System.Drawing.Size(112, 20)
    Me.Button1.TabIndex = 0
    Me.Button1.Text = "AbortRetryIgnore"
    "
    "GroupBox1
    "
    Me.GroupBox1.Controls.AddRange(New System.Windows.Forms.Control() {Me.Icon8, Me.Icon7, Me.Icon6, Me.Icon5, Me.Icon4, Me.Icon3, Me.Icon2, Me.Icon1})
    Me.GroupBox1.Location = New System.Drawing.Point(12, 72)
    Me.GroupBox1.Name = "GroupBox1"
    Me.GroupBox1.Size = New System.Drawing.Size(188, 124)
    Me.GroupBox1.TabIndex = 2
    Me.GroupBox1.TabStop = False
    Me.GroupBox1.Text = "Icon"
    "
    "Icon8
    "
    Me.Icon8.Location = New System.Drawing.Point(100, 92)
    Me.Icon8.Name = "Icon8"
    Me.Icon8.Size = New System.Drawing.Size(64, 20)
    Me.Icon8.TabIndex = 7
    Me.Icon8.Text = "Warning"
    "
    "Icon7
    "
    Me.Icon7.Location = New System.Drawing.Point(12, 92)
    Me.Icon7.Name = "Icon7"
    Me.Icon7.Size = New System.Drawing.Size(84, 20)
    Me.Icon7.TabIndex = 6
    Me.Icon7.Text = "Stop"
    "
    "Icon6
    "
    Me.Icon6.Location = New System.Drawing.Point(100, 68)
    Me.Icon6.Name = "Icon6"
    Me.Icon6.Size = New System.Drawing.Size(64, 20)
    Me.Icon6.TabIndex = 5
    Me.Icon6.Text = "Question"
    "
    "Icon5
    "
    Me.Icon5.Checked = True
    Me.Icon5.Location = New System.Drawing.Point(12, 68)
    Me.Icon5.Name = "Icon5"
    Me.Icon5.Size = New System.Drawing.Size(84, 20)
    Me.Icon5.TabIndex = 4
    Me.Icon5.TabStop = True
    Me.Icon5.Text = "Information"
    "
    "Icon4
    "
    Me.Icon4.Location = New System.Drawing.Point(100, 44)
    Me.Icon4.Name = "Icon4"
    Me.Icon4.Size = New System.Drawing.Size(64, 20)
    Me.Icon4.TabIndex = 3
    Me.Icon4.Text = "Hand"
    "
    "Icon3
    "
    Me.Icon3.Location = New System.Drawing.Point(12, 44)
    Me.Icon3.Name = "Icon3"
    Me.Icon3.Size = New System.Drawing.Size(84, 20)
    Me.Icon3.TabIndex = 2
    Me.Icon3.Text = "Exclamation"
    "
    "Icon2
    "
    Me.Icon2.Location = New System.Drawing.Point(100, 20)
    Me.Icon2.Name = "Icon2"
    Me.Icon2.Size = New System.Drawing.Size(64, 20)
    Me.Icon2.TabIndex = 1
    Me.Icon2.Text = "Error"
    "
    "Icon1
    "
    Me.Icon1.Location = New System.Drawing.Point(12, 20)
    Me.Icon1.Name = "Icon1"
    Me.Icon1.Size = New System.Drawing.Size(84, 20)
    Me.Icon1.TabIndex = 0
    Me.Icon1.Text = "Asterisk"
    "
    "txtResult
    "
    Me.txtResult.Enabled = False
    Me.txtResult.Location = New System.Drawing.Point(212, 232)
    Me.txtResult.Name = "txtResult"
    Me.txtResult.Size = New System.Drawing.Size(136, 22)
    Me.txtResult.TabIndex = 18
    Me.txtResult.Text = ""
    "
    "lblResult
    "
    Me.lblResult.Location = New System.Drawing.Point(212, 208)
    Me.lblResult.Name = "lblResult"
    Me.lblResult.Size = New System.Drawing.Size(56, 20)
    Me.lblResult.TabIndex = 17
    Me.lblResult.Text = "Result"
    "
    "Form1
    "
    Me.AutoScaleBaseSize = New System.Drawing.Size(5, 15)
    Me.ClientSize = New System.Drawing.Size(368, 369)
    Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.grpDefaultButton, Me.GroupBox2, Me.GroupBox1, Me.txtResult, Me.lblResult, Me.txtCaption, Me.Label2, Me.btnShow, Me.txtMsg, Me.Label1})
    Me.Name = "Form1"
    Me.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen
    Me.Text = "MessageBox Application"
    Me.grpDefaultButton.ResumeLayout(False)
    Me.GroupBox2.ResumeLayout(False)
    Me.GroupBox1.ResumeLayout(False)
    Me.ResumeLayout(False)
  End Sub

  Private iIcon As Integer
  Private iButton As Integer
  Private iDefaultButton As Integer
  Private Sub btnShow_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnShow.Click
    Dim iResult As Integer
    iResult = MessageBox.Show(Me,txtMsg.Text, txtCaption.Text, iButton, iIcon, iDefaultButton)
    Select Case iResult
      Case DialogResult.Abort
        txtResult.Text = "DialogResult.Abort"
      Case DialogResult.Retry
        txtResult.Text = "DialogResult.Retry"
      Case DialogResult.Ignore
        txtResult.Text = "DialogResult.Ignore"
      Case DialogResult.OK
        txtResult.Text = "DialogResult.OK"
      Case DialogResult.Cancel
        txtResult.Text = "DialogResult.Cancel"
      Case DialogResult.Yes
        txtResult.Text = "DialogResult.Yes"
      Case DialogResult.No
        txtResult.Text = "DialogResult.No"
    End Select
  End Sub
  Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
    AddHandler Icon1.Click, AddressOf Icon_Click
    AddHandler Icon2.Click, AddressOf Icon_Click
    AddHandler Icon3.Click, AddressOf Icon_Click
    AddHandler Icon4.Click, AddressOf Icon_Click
    AddHandler Icon5.Click, AddressOf Icon_Click
    AddHandler Icon6.Click, AddressOf Icon_Click
    AddHandler Icon7.Click, AddressOf Icon_Click
    AddHandler Icon8.Click, AddressOf Icon_Click
    AddHandler Button1.Click, AddressOf Button_Click
    AddHandler Button2.Click, AddressOf Button_Click
    AddHandler Button3.Click, AddressOf Button_Click
    AddHandler Button4.Click, AddressOf Button_Click
    AddHandler Button5.Click, AddressOf Button_Click
    AddHandler Button6.Click, AddressOf Button_Click
    AddHandler DefaultButton1.Click, AddressOf DefaultButton_Click
    AddHandler DefaultButton2.Click, AddressOf DefaultButton_Click
    AddHandler DefaultButton3.Click, AddressOf DefaultButton_Click
    iIcon = MessageBoxIcon.Information
    iButton = MessageBoxButtons.YesNo
    iDefaultButton = MessageBoxDefaultButton.Button1
  End Sub
  Public Sub Icon_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    Select Case sender.Name
      Case "Icon1"
        iIcon = MessageBoxIcon.Asterisk
      Case "Icon2"
        iIcon = MessageBoxIcon.Error
      Case "Icon3"
        iIcon = MessageBoxIcon.Exclamation
      Case "Icon4"
        iIcon = MessageBoxIcon.Hand
      Case "Icon5"
        iIcon = MessageBoxIcon.Information
      Case "Icon6"
        iIcon = MessageBoxIcon.Question
      Case "Icon7"
        iIcon = MessageBoxIcon.Stop
      Case "Icon8"
        iIcon = MessageBoxIcon.Warning
    End Select
  End Sub
  Public Sub Button_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    Select Case sender.Name
      Case "Button1"
        iButton = MessageBoxButtons.AbortRetryIgnore
      Case "Button2"
        iButton = MessageBoxButtons.OK
      Case "Button3"
        iButton = MessageBoxButtons.OKCancel
      Case "Button4"
        iButton = MessageBoxButtons.RetryCancel
      Case "Button5"
        iButton = MessageBoxButtons.YesNo
      Case "Button6"
        iButton = MessageBoxButtons.YesNoCancel
    End Select
  End Sub
  Public Sub DefaultButton_Click(ByVal sender As Object, ByVal e As System.EventArgs)
    Select Case sender.Name
      Case "DefaultButton1"
        iDefaultButton = MessageBoxDefaultButton.Button1
      Case "DefaultButton2"
        iDefaultButton = MessageBoxDefaultButton.Button2
      Case "DefaultButton3"
        iDefaultButton = MessageBoxDefaultButton.Button3
    End Select
  End Sub
End Class

Displaying square root of 2 in dialog.

Imports System.Windows.Forms " Namespace containing MessageBox
Module modSquareRoot
   Sub Main()
      Dim root As Double = Math.Sqrt(2)
      MessageBox.Show("The square root of 2 is " & root, _
         "The Square Root of 2")
   End Sub 
End Module

MessageBox: Abort, Retry, Ignore buttons and Warning icon

Imports System.Windows.Forms
public class MessageBoxWithMessageAndTile
   public Shared Sub Main
        MessageBox.Show("Message", "Title", MessageBoxButtons.AbortRetryIgnore, MessageBoxIcon.Warn
ing)
   End Sub
End class

MessageBox Icon and Button

Imports System.Windows.Forms
public class RadioButtonAction
   public Shared Sub Main
        Application.Run(New FrmRadioButton)
   End Sub
End class
Public Class FrmRadioButton
   Inherits System.Windows.Forms.Form
   Private iconType As MessageBoxIcon
   Private buttonType As MessageBoxButtons
#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 iconGroupBox As System.Windows.Forms.GroupBox
   Friend WithEvents buttonTypeGroupBox As System.Windows.Forms.GroupBox
   Friend WithEvents radRetryCancel As System.Windows.Forms.RadioButton
   Friend WithEvents radYesNo As System.Windows.Forms.RadioButton
   Friend WithEvents radAbortRetryIgnore As System.Windows.Forms.RadioButton
   Friend WithEvents radOk As System.Windows.Forms.RadioButton
   Friend WithEvents radWarning As System.Windows.Forms.RadioButton
   Friend WithEvents radStop As System.Windows.Forms.RadioButton
   Friend WithEvents radQuestion As System.Windows.Forms.RadioButton
   Friend WithEvents radInformation As System.Windows.Forms.RadioButton
   Friend WithEvents radHand As System.Windows.Forms.RadioButton
   Friend WithEvents radExclamation As System.Windows.Forms.RadioButton
   Friend WithEvents radError As System.Windows.Forms.RadioButton
   Friend WithEvents radAsterisk As System.Windows.Forms.RadioButton
   Friend WithEvents cmdDisplay As System.Windows.Forms.Button
   Friend WithEvents lblDisplay As System.Windows.Forms.Label
   Friend WithEvents radOkCancel As System.Windows.Forms.RadioButton
   Friend WithEvents radYesNoCancel As System.Windows.Forms.RadioButton
   "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.radAbortRetryIgnore = New System.Windows.Forms.RadioButton()
      Me.radStop = New System.Windows.Forms.RadioButton()
      Me.radYesNo = New System.Windows.Forms.RadioButton()
      Me.iconGroupBox = New System.Windows.Forms.GroupBox()
      Me.radWarning = New System.Windows.Forms.RadioButton()
      Me.radQuestion = New System.Windows.Forms.RadioButton()
      Me.radInformation = New System.Windows.Forms.RadioButton()
      Me.radHand = New System.Windows.Forms.RadioButton()
      Me.radExclamation = New System.Windows.Forms.RadioButton()
      Me.radError = New System.Windows.Forms.RadioButton()
      Me.radAsterisk = New System.Windows.Forms.RadioButton()
      Me.radYesNoCancel = New System.Windows.Forms.RadioButton()
      Me.radOk = New System.Windows.Forms.RadioButton()
      Me.cmdDisplay = New System.Windows.Forms.Button()
      Me.lblDisplay = New System.Windows.Forms.Label()
      Me.buttonTypeGroupBox = New System.Windows.Forms.GroupBox()
      Me.radRetryCancel = New System.Windows.Forms.RadioButton()
      Me.radOkCancel = New System.Windows.Forms.RadioButton()
      Me.iconGroupBox.SuspendLayout()
      Me.buttonTypeGroupBox.SuspendLayout()
      Me.SuspendLayout()
      "
      "radAbortRetryIgnore
      "
      Me.radAbortRetryIgnore.Location = New System.Drawing.Point(16, 88)
      Me.radAbortRetryIgnore.Name = "radAbortRetryIgnore"
      Me.radAbortRetryIgnore.Size = New System.Drawing.Size(120, 24)
      Me.radAbortRetryIgnore.TabIndex = 2
      Me.radAbortRetryIgnore.Text = "AbortRetryIgnore"
      "
      "radStop
      "
      Me.radStop.Location = New System.Drawing.Point(16, 240)
      Me.radStop.Name = "radStop"
      Me.radStop.Size = New System.Drawing.Size(128, 24)
      Me.radStop.TabIndex = 6
      Me.radStop.Text = "Stop"
      "
      "radYesNo
      "
      Me.radYesNo.Location = New System.Drawing.Point(16, 160)
      Me.radYesNo.Name = "radYesNo"
      Me.radYesNo.Size = New System.Drawing.Size(120, 16)
      Me.radYesNo.TabIndex = 4
      Me.radYesNo.Text = "YesNo"
      "
      "iconGroupBox
      "
      Me.iconGroupBox.Controls.AddRange(New System.Windows.Forms.Control() {Me.radWarning, Me.radStop, Me.radQuestion, Me.radInformation, Me.radHand, Me.radExclamation, Me.radError, Me.radAsterisk})
      Me.iconGroupBox.Location = New System.Drawing.Point(200, 16)
      Me.iconGroupBox.Name = "iconGroupBox"
      Me.iconGroupBox.Size = New System.Drawing.Size(160, 304)
      Me.iconGroupBox.TabIndex = 3
      Me.iconGroupBox.TabStop = False
      Me.iconGroupBox.Text = "Icon"
      "
      "radWarning
      "
      Me.radWarning.Location = New System.Drawing.Point(16, 272)
      Me.radWarning.Name = "radWarning"
      Me.radWarning.Size = New System.Drawing.Size(128, 24)
      Me.radWarning.TabIndex = 7
      Me.radWarning.Text = "Warning"
      "
      "radQuestion
      "
      Me.radQuestion.Location = New System.Drawing.Point(16, 208)
      Me.radQuestion.Name = "radQuestion"
      Me.radQuestion.Size = New System.Drawing.Size(128, 24)
      Me.radQuestion.TabIndex = 5
      Me.radQuestion.Text = "Question"
      "
      "radInformation
      "
      Me.radInformation.Location = New System.Drawing.Point(16, 168)
      Me.radInformation.Name = "radInformation"
      Me.radInformation.Size = New System.Drawing.Size(128, 24)
      Me.radInformation.TabIndex = 4
      Me.radInformation.Text = "Information"
      "
      "radHand
      "
      Me.radHand.Location = New System.Drawing.Point(16, 128)
      Me.radHand.Name = "radHand"
      Me.radHand.Size = New System.Drawing.Size(128, 24)
      Me.radHand.TabIndex = 3
      Me.radHand.Text = "Hand"
      "
      "radExclamation
      "
      Me.radExclamation.Location = New System.Drawing.Point(16, 88)
      Me.radExclamation.Name = "radExclamation"
      Me.radExclamation.Size = New System.Drawing.Size(136, 24)
      Me.radExclamation.TabIndex = 2
      Me.radExclamation.Text = "Exclamation"
      "
      "radError
      "
      Me.radError.Location = New System.Drawing.Point(16, 48)
      Me.radError.Name = "radError"
      Me.radError.Size = New System.Drawing.Size(136, 24)
      Me.radError.TabIndex = 1
      Me.radError.Text = "Error"
      "
      "radAsterisk
      "
      Me.radAsterisk.Location = New System.Drawing.Point(16, 16)
      Me.radAsterisk.Name = "radAsterisk"
      Me.radAsterisk.Size = New System.Drawing.Size(136, 24)
      Me.radAsterisk.TabIndex = 0
      Me.radAsterisk.Text = "Asterisk"
      "
      "radYesNoCancel
      "
      Me.radYesNoCancel.Location = New System.Drawing.Point(16, 120)
      Me.radYesNoCancel.Name = "radYesNoCancel"
      Me.radYesNoCancel.Size = New System.Drawing.Size(120, 24)
      Me.radYesNoCancel.TabIndex = 3
      Me.radYesNoCancel.Text = "YesNoCancel"
      "
      "radOk
      "
      Me.radOk.Location = New System.Drawing.Point(16, 24)
      Me.radOk.Name = "radOk"
      Me.radOk.Size = New System.Drawing.Size(112, 16)
      Me.radOk.TabIndex = 0
      Me.radOk.Text = "OK"
      "
      "cmdDisplay
      "
      Me.cmdDisplay.Location = New System.Drawing.Point(32, 240)
      Me.cmdDisplay.Name = "cmdDisplay"
      Me.cmdDisplay.Size = New System.Drawing.Size(112, 40)
      Me.cmdDisplay.TabIndex = 1
      Me.cmdDisplay.Text = "Display"
      "
      "lblDisplay
      "
      Me.lblDisplay.Location = New System.Drawing.Point(24, 296)
      Me.lblDisplay.Name = "lblDisplay"
      Me.lblDisplay.Size = New System.Drawing.Size(144, 24)
      Me.lblDisplay.TabIndex = 5
      "
      "buttonTypeGroupBox
      "
      Me.buttonTypeGroupBox.Controls.AddRange(New System.Windows.Forms.Control() {Me.radRetryCancel, Me.radYesNo, Me.radYesNoCancel, Me.radAbortRetryIgnore, Me.radOkCancel, Me.radOk})
      Me.buttonTypeGroupBox.Location = New System.Drawing.Point(16, 16)
      Me.buttonTypeGroupBox.Name = "buttonTypeGroupBox"
      Me.buttonTypeGroupBox.Size = New System.Drawing.Size(144, 216)
      Me.buttonTypeGroupBox.TabIndex = 2
      Me.buttonTypeGroupBox.TabStop = False
      Me.buttonTypeGroupBox.Text = "Button Type"
      "
      "radRetryCancel
      "
      Me.radRetryCancel.Location = New System.Drawing.Point(16, 192)
      Me.radRetryCancel.Name = "radRetryCancel"
      Me.radRetryCancel.Size = New System.Drawing.Size(104, 16)
      Me.radRetryCancel.TabIndex = 5
      Me.radRetryCancel.Text = "RetryCancel"
      "
      "radOkCancel
      "
      Me.radOkCancel.Location = New System.Drawing.Point(16, 56)
      Me.radOkCancel.Name = "radOkCancel"
      Me.radOkCancel.Size = New System.Drawing.Size(120, 24)
      Me.radOkCancel.TabIndex = 1
      Me.radOkCancel.Text = "OKCancel"
      "
      "FrmRadioButton
      "
      Me.AutoScaleBaseSize = New System.Drawing.Size(5, 13)
      Me.ClientSize = New System.Drawing.Size(384, 333)
      Me.Controls.AddRange(New System.Windows.Forms.Control() {Me.lblDisplay, Me.iconGroupBox, Me.buttonTypeGroupBox, Me.cmdDisplay})
      Me.Name = "FrmRadioButton"
      Me.Text = "RadioButtonTest"
      Me.iconGroupBox.ResumeLayout(False)
      Me.buttonTypeGroupBox.ResumeLayout(False)
      Me.ResumeLayout(False)
   End Sub
#End Region
   Private Sub cmdDisplay_Click(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles cmdDisplay.Click
      Dim dialog As DialogResult = MessageBox.Show( _
         "Your message", "Title", _
         buttonType, iconType)
      Select Case dialog
         Case DialogResult.OK
            lblDisplay.Text = "OK was pressed"
         Case DialogResult.Cancel
            lblDisplay.Text = "Cancel was pressed"
         Case DialogResult.Abort
            lblDisplay.Text = "Abort was pressed"
         Case DialogResult.Retry
            lblDisplay.Text = "Retry was pressed"
         Case DialogResult.Ignore
            lblDisplay.Text = "Ignore was pressed"
         Case DialogResult.Yes
            lblDisplay.Text = "Yes was pressed"
         Case DialogResult.No
            lblDisplay.Text = "No was pressed"
      End Select
   End Sub " cmdDisplay_Click
   Private Sub radOk_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radOk.CheckedChanged
      buttonType = MessageBoxButtons.OK
   End Sub 
   
   Private Sub radOkCancel_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radOkCancel.CheckedChanged
      buttonType = MessageBoxButtons.OKCancel
   End Sub 
   
   Private Sub radAbortRetryIgnore_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radAbortRetryIgnore.CheckedChanged
      buttonType = MessageBoxButtons.AbortRetryIgnore
   End Sub 
   
   Private Sub radYesNoCancel_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radYesNoCancel.CheckedChanged
      buttonType = MessageBoxButtons.YesNoCancel
   End Sub
   
   Private Sub radYesNo_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radYesNo.CheckedChanged
      buttonType = MessageBoxButtons.YesNo
   End Sub
   
   Private Sub radRetryCancel_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radRetryCancel.CheckedChanged
      buttonType = MessageBoxButtons.RetryCancel
   End Sub
   
   Private Sub radAsterisk_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radAsterisk.CheckedChanged
      iconType = MessageBoxIcon.Asterisk
   End Sub
   
   Private Sub radError_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radError.CheckedChanged
      iconType = MessageBoxIcon.Error
   End Sub 
   
   Private Sub radExclamation_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radExclamation.CheckedChanged
      iconType = MessageBoxIcon.Exclamation
   End Sub 
   
   Private Sub radHand_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radHand.CheckedChanged
      iconType = MessageBoxIcon.Hand
   End Sub 
   
   Private Sub radInformation_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radInformation.CheckedChanged
      iconType = MessageBoxIcon.Information
   End Sub 
   
   Private Sub radQuestion_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radQuestion.CheckedChanged
      iconType = MessageBoxIcon.Question
   End Sub 
   
   Private Sub radStop_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radStop.CheckedChanged
      iconType = MessageBoxIcon.Stop
   End Sub 
   
   Private Sub radWarning_CheckedChanged(ByVal sender _
      As System.Object, ByVal e As System.EventArgs) _
      Handles radWarning.CheckedChanged
      iconType = MessageBoxIcon.Warning
   End Sub 
End Class

MessageBox OK and Cancel Button

Imports System.Windows.Forms
public class MessageBoxWithMessageAndTile
   public Shared Sub Main
        MessageBox.Show("Message", "Title", MessageBoxButtons.OKCancel)
   End Sub
End class

MessageBox with Message and Title

Imports System.Windows.Forms
public class MessageBoxWithMessageAndTile
   public Shared Sub Main
        MessageBox.Show("Message", "Title")
   End Sub
End class

MessageBox with Message only

Imports System.Windows.Forms
public class MessageBoxWithMessageOnly
   public Shared Sub Main
        MessageBox.Show("Message")
   End Sub
End class

MessageBox with OK, Cancel button and Information

Imports System.Windows.Forms
public class MessageBoxOKCancelInformation
   public Shared Sub Main
      Dim answer As DialogResult
      answer = MessageBox.Show("A","B", MessageBoxButtons.OKCancel,MessageBoxIcon.Information)
   End Sub
End class

MessageBox with Yes No Cancel button and Question icon

Imports System.Windows.Forms
public class MessageBoxYesNoCancelQuestion
   public Shared Sub Main
      Dim answer As DialogResult
      answer = MessageBox.Show("A", "B", _
         MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question)
   End Sub
End class

Return value from MessageBox

Imports System.Drawing
Imports System.Drawing.Drawing2D
Imports System.Windows.Forms
public class MessageBoxReturnValue
   public Shared Sub Main
        Dim intReturnValue As Integer
        intReturnValue = MessageBox.Show("This is also a message box!", "Message Box", _
            MessageBoxButtons.OKCancel, MessageBoxIcon.Information, _
            MessageBoxDefaultButton.Button1, MessageBoxOptions.DefaultDesktopOnly)
        If (intReturnValue = DialogResult.OK) Then
            Console.WriteLine("You clicked the OK button.")
        End If
   End Sub
End class

Set default button for MessageBox

Imports System.Windows.Forms
public class MessageBoxDefaultButtonDemo
   public Shared Sub Main
      Dim answer As DialogResult
      answer = MessageBox.Show("A", "B",MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question, _
         MessageBoxDefaultButton.Button2)
   End Sub
End class