I\'ve recently got the source-code on a application. When im trying to build the solution, I get an error in all parts where winnt.h is included. The error code
winnt.h
Try to remove DirectX SDK if you have one.
Here bug is accepted: http://connect.microsoft.com/VisualStudio/feedback/details/508204/vc10-0-errors-while-compiling-winnt-h