Electronic Books

Technically, it doesn??™t matter where you define the Popup tag because it??™s not associated
with any particular control. Instead, it??™s up to you to set the placement properties to position
the Popup in the correct spot. In this example, the Popup appears at the current mouse position,
which is the simplest option.
You can use a Popup to provide a link for a
specific term
of interest.
PopupAnimation="Slide" AllowsTransparency="True">


For more information, see
Click="lnk_Click">Wikipedia



This example presents two elements that you might not have seen before. The Run element
allows you to apply formatting to a specific part of a TextBlock??”it??™s a piece of flow
content that you??™ll learn about in Chapter 19 when you consider documents. The Hyperlink
CHAPTER 7 n CLASSIC CONTROLS 205
allows you to provide a clickable piece of text. You??™ll take a closer look at it in Chapter 9, when
you consider page-based applications.


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