How to achieve that just the top modal window is accessible?
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Following problem. In my application you can open multiple modal windows. Every window is dependent on the previous opened window (hierarchical). Means that when a child window is opened, the user cannot drag this child window aside and interact with the parent window.

How can I achieve, that the surface behind the top child window freezes? I use [RadWindow][1], by the way.


  [1]: http://www.telerik.com/help/silverlight/radwindow-overview.html