to build vcagp2.cpp (used in demo_detector_haar as camera acquisition provider) there are some other tricks
1. create a dummy dxtrans.h which seems to be missing in the SDK:
c:\Program Files\Microsoft SDKs\Windows\v6.0A\Include\dxtrans.h
#define __IDxtCompositor_INTERFACE_DEFINED__
#define __IDxtAlphaSetter_INTERFACE_DEFINED__
#define __IDxtJpeg_INTERFACE_DEFINED__
#define __IDxtKey_INTERFACE_DEFINED__