WPF VB.Net

  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
  xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
  xmlns:d="http://schemas.microsoft.com/expression/interactivedesigner/2006"
  mc:Ignorable="d" Background="#FFFFFFFF" x:Name="DocumentRoot"
  x:Class="InputExamples.EventHandling" Width="640" Height="480">
  
    
  

  
  
    
  

  
  
  

            VerticalAlignment="Top" 
          Width="106" 
          Height="28" 
          x:Name="ClickButton1" 
          Content="Click Me!" 
          Click="ClickHandler" PreviewMouseUp="ButtonMouseUpHandler"/>
            HorizontalAlignment="Left" 
          VerticalAlignment="Top" 
          Margin="20" 
          Width="106" 
          Height="28" 
          x:Name="ClickButton2" 
          Content="Click Me!" 
          Click="ClickHandler" 
          PreviewMouseUp="ButtonMouseUpHandler"/>

//File:Window.xaml.vb
Imports System
Imports System.IO
Imports System.Net
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Animation
Imports System.Windows.Navigation
Namespace InputExamples
  Public Partial Class EventHandling
    Public Sub New()
      Me.InitializeComponent()
    End Sub
    Private Sub ClickHandler(sender As Object, e As RoutedEventArgs)
      Dim clicked As Button = TryCast(e.Source, Button)
      MessageBox.Show([String].Format("{0} was clicked!", clicked.Name))
    End Sub
    Private Sub ButtonMouseUpHandler(sender As Object, e As MouseButtonEventArgs)
      Dim clicked As Button = TryCast(sender, Button)
      clicked.Content = [String].Format("{0} clicked", clicked.Name)
    End Sub
  End Class
End Namespace