How to display Child window using Navigation Framework

I'm new to silverlight 4.Child window should popup In aboutpage(BusinessApplication) when i click button.

How to make it ?

I had seen this link but didnt undestand.so anyone give me sample plz?

http://stackoverflow.com/questions/4...tion-framework

http://forums.silverlight.net/forums...55/519201.aspx..

The Navigation Framework is for navigating around your application's pages. To show your childwindow, you can create a new ChildWindow, set its content property, and then invoke the Show method of the ChildWindow class.