Also I don't know why winnt.h has to be included (it's not neccessary with the standard version)...
This error seems to depand on missing defines that winnt.h needs, but I'm not sure about that...
EDIT: also I saw you're using VC++, but you say that you also use the DX DevPak ???
VC++ doesn't work with the DevPak, you'll need to install the MS-DX-SDK...
