How to: Delay the Display of a ToolTip
This example shows how to set a ToolTipService property that causes a brief delay before a ToolTip displays. You set the properties of the ToolTipService class by attaching them directly to the element that exposes the tooltip.
Example
<TextBox HorizontalAlignment="Left" ToolTipService.InitialShowDelay="1500"
ToolTip="Useful information goes here.">
ToolTip with delay
</TextBox>