so nothing works. I installed MSVC express as well as the xp 64 SDK and no matter how many places I add the include directories, it will not compile. wtf? does anyone have any good links/resources for how to develope for win32 and win64 under win xp 64 pro? am I better off just making a win xp 32 install and switching back and forth? what about VMWare? they just opened their stuff. can that help me at all?