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On Key Down Handler

<Window x: Class="WpfApplication1.Window1"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="KeyDown Sample" Height="400" Width="500">   <StackPanel>     <TextBlock Width="300" Height="20">       Type some text into the TextBox and press the Enter key.     </TextBlock>     <TextBox Width="300" Height="30" Name="textBox1"              KeyDown="OnKeyDownHandler"/>     <TextBlock Width="300" Height="100" Name="textBlock1"/>   </StackPanel> </Window> //File:Window.xaml.vb Imports System Imports System.Windows Imports System.Windows.Controls Imports System.Windows.Input Namespace WpfApplication1   Public Partial Class Window1     Inherits Window     Public Sub New()       InitializeComponent()     End Sub     Private Sub OnKeyDownHandler(sender As Object, e As KeyEventArgs)       If e.Key = Key.[Return] Then         textBlock1.Text = "You Entered: " + textBox1.Text       End If     End Sub   End Class End Namespace