Add ToolTip text to a TextBox Posted on February 11, 2011June 27, 2015 by coder <Page xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" HorizontalAlignment="Center" VerticalAlignment="Center"> <TextBox Width="100" ToolTip="Type something here" /> </Page>