All Telerik .NET tools and Kendo UI JavaScript components in one package. Now enhanced with:
You could edit the template for the RadWindow. I would suggest you to refer to the following links - http://www.telerik.com/help/silverlight/radwindow-styles-and-templates-template-structure.html and http://www.telerik.com/help/silverlight/radwindow-styles-and-templates-styling-the-radwindow.html I hope this helps.