what happened to dwmapi - aero glass

I have searched hi and low for this answer but have yet to figure out what MS has done to the aero glass api's.

http://msdn.microsoft.com/library/default....oclientarea.asp

Every where I look there are references to dwmapi.h and dwmapi.dll and dwmapi.lib files, but where are these files? They don't exist anymore. I have a complete msvc 2005 pro installation, I have a separate windows vista machine and I cannot find these files. Does any one have an idea what MS has done with these files. Every example I've come across shows these files.

Thanks,

Art

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