Is it possible to overlay HTML over XBAP?

Is it possible to overlay HTML elements over XBAP?

I have an XBAP application in an iframe on a webpage, and I'm trying to overlay HTML elements over it. I can easily do it over Flash, but I ha开发者_开发技巧ve yet to figure out how to do it over XBAP.

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This is not possible with XBAP. If you can use Silverlight then a solution is available to using Windowless controls (MSDN link).