VB.Net/Event/Focus

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Focus event Demo: Button lost focus

<source lang="vbnet"> Imports System Imports System.Collections Imports System.ruponentModel Imports System.Windows.Forms Imports System.Data Imports System.Configuration Imports System.Resources Imports System.Drawing Imports System.Drawing.Drawing2D

Public Class MainClass

   Shared Sub Main()
       Dim myform As Form = New Form1()
       Application.Run(myform)
   End Sub

End Class Public Class Form1

   Private Sub Button1_Click(ByVal sender As System.Object, _
       ByVal e As System.EventArgs) Handles Button1.Click
       "Display a MessageBox
       MessageBox.Show("The MouseUp event has been fired.", "Info")
   End Sub
   Private Sub Button1_LostFocus(ByVal sender As Object, _
       ByVal e As System.EventArgs) Handles Button1.LostFocus
       "Display a MessageBox
       MessageBox.Show("Button1 has lost focus.", "Info")
   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.Button2 = New System.Windows.Forms.Button
       Me.Button1 = New System.Windows.Forms.Button
       Me.SuspendLayout()
       "
       "Button2
       "
       Me.Button2.Location = New System.Drawing.Point(136, 33)
       Me.Button2.Name = "Button2"
       Me.Button2.Size = New System.Drawing.Size(93, 23)
       Me.Button2.TabIndex = 3
       Me.Button2.Text = "Button2"
       "
       "Button1
       "
       Me.Button1.Location = New System.Drawing.Point(24, 33)
       Me.Button1.Name = "Button1"
       Me.Button1.Size = New System.Drawing.Size(93, 23)
       Me.Button1.TabIndex = 2
       Me.Button1.Text = "Mouse Events"
       "
       "Form1
       "
       Me.AutoScaleDimensions = New System.Drawing.SizeF(6.0!, 13.0!)
       Me.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font
       Me.ClientSize = New System.Drawing.Size(253, 89)
       Me.Controls.Add(Me.Button2)
       Me.Controls.Add(Me.Button1)
       Me.Name = "Form1"
       Me.Text = "Form1"
       Me.ResumeLayout(False)
   End Sub
   Friend WithEvents Button2 As System.Windows.Forms.Button
   Friend WithEvents Button1 As System.Windows.Forms.Button

End Class

      </source>