[plt-scheme] get Windows hwnd from canvas%

Hi,

Is there a way to get a Windows HWND from an instance of canvas%?  I 
feel as if a similar question was asked recently, but haven't been able to 
find it or the response.

I'm wondering about hosting a QuickTime movie (CreatePostAssociation)
in a canvas%, so that MrEd can manage it (resize, move, expose).
Of course I still need to do something about hooking the Window and
scheme event loops together.

Thanks,

Ron
stanonik at cogsci.ucsd.edu