<Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
      xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

      HorizontalAlignment="Center" VerticalAlignment="Center">

<!-- Example 5-12. Using ToolTip -->

<TextBox Width="100" ToolTip="Type something here" />

<!-- End of Example 5-12. -->

</Page>