The RadWindow control is not designed to work as a MDI window so it doesn't support a MDI container which to be restricte in. However the RadWindow control supports RestrictedArea feature which might help you to implement this. To enable the feature you need to set the IsRestricted property to true. This will restrict the window to the edges of the Silverlight plugin. To change the area which the window is restricted in you need to set the RestrictedAreaMargin property which is of type Thickness and represents the distances of the are from the left, top, right and bottom edges of the Silverlight plugin which are by default all zeros.
Hope this helps.
the Telerik team
Explore the entire Telerik portfolio by downloading the Ultimate Collection trial package. Get now >>