WPF VB.Net

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    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="170" Width="200">
    
        
            
                
                    
                    
                
            
            
            
        
        
    

//File:Window.xaml.vb
Imports System
Imports System.Windows
Imports System.Windows.Input
Namespace WpfApplication1
  Public Partial Class Window1
    Inherits Window
    Public Sub New()
      InitializeComponent()
      CheckKeyboardState()
    End Sub
    Private Sub Button_Click(sender As Object, e As RoutedEventArgs)
      CheckKeyboardState()
    End Sub
    Private Sub CheckKeyboardState()
      chkLControl.IsChecked = Keyboard.IsKeyDown(Key.LeftCtrl)
      chkRControl.IsChecked = Keyboard.IsKeyDown(Key.RightCtrl)
    End Sub
  End Class
End Namespace