WPF VB.Net

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Press F1 to get help" Height="250" Width="400">
  
    
      
        
        
        
      
    
    
  
   

//File:Window.xaml.vb
Imports System
Imports System.Collections.Generic
Imports System.Text
Imports System.Windows
Imports System.Windows.Controls
Imports System.Windows.Data
Imports System.Windows.Documents
Imports System.Windows.Input
Imports System.Windows.Media
Imports System.Windows.Media.Imaging
Imports System.Windows.Shapes
Namespace WpfApplication1
  Public Partial Class MainWindow
    Inherits System.Windows.Window
    Public Sub New()
      InitializeComponent()
      Dim helpBinding As New CommandBinding(ApplicationCommands.Help)
      AddHandler helpBinding.CanExecute, AddressOf CanHelpExecute
      AddHandler helpBinding.Executed, AddressOf HelpExecuted
      CommandBindings.Add(helpBinding)
    End Sub
    Private Sub CanHelpExecute(sender As Object, e As CanExecuteRoutedEventArgs)
      e.CanExecute = True
    End Sub
    Private Sub HelpExecuted(sender As Object, e As ExecutedRoutedEventArgs)
      MessageBox.Show("support", "Help!")
    End Sub
  End Class
End Namespace