XInput

I'm using VS 7.1 and the Release_0_4_5 tse sources, and when I build the SDK solution, I'm getting an error that "fatal error C1083: Cannot open include file: 'xinput.h'". I've search my entire c drive and I don't have a 'xinput.h' file anywhere. So, I've searched around looking for this file and library and I haven't been able to find anywhere that I can get this library/header??? I did find a link on microsoft's website to an installer that looked like just what I needed, but that installer will not run. It comes up with a dialog that says 'installation not complete'. Oh Joy!

Anyone have any suggestions on how to work around this?? Should I checkout an earlier version of the sources??

Thanks, Scott