Re: An example of a reusable draggable resizable window control created in Silverlight 2.0
:)
If i may, i would say that, having the WindowControl allowing to insert any component on it, and not just an Image would be more important than the corner resize :)
There is a nice one here: http://silverlight.net/forums/t/12467.aspx
But yours is better at resizing, since unlike the one on that thread, it doesn't "move" when resizing.