So were you referring something similar to the context menu thrown when right clicking on this demo page's
monitor screen/desktop? If so, then this would be an instance of a Silverlight 3 child window that WebUI is unable to recognize since it is not part of the app's visual tree.
As in the demo, the items in the context menu cannot be highlighted with WebUI. If your window/menu is not highlighted by WebUI also, then it would be a simlar case.
We are working other ways to automate the child windows and hope to have this resolved in a future versions of the product. If you were referring to another Rad control, please point out which one in the demo pages.
the Telerik team