WPF Custom Window Border for Children

I'm searching for a way to create a border of sunflowers instead of the classic rectangler border.

Does anyone know a way to do this?

To give a better u开发者_StackOverflow社区nderstanding what a mean I created a simple thing in paint to demonstrate.

http://img819.imageshack.us/img819/174/90265955.jpg

Thanks!

-Greetz- Vincent

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You may have a look at this: http://msdn.microsoft.com/en-us/library/aa358516.aspx