<Grid x:Name="LayoutRoot" Background="#770098"><Button x:Name="MyButton" Content="Push Me" Height="50" Width="100" Click="MyButton_Click"></Button></Grid>
Private Sub MyButton_Click(ByVal sender As System.Object, ByVal e As System.Windows.RoutedEventArgs) If MyButton.IsPressed Then MyButton.Content = "Pushed !!!" End If End Sub