visual studio 2010 - afxwin.h(112): fatal error C1189: #error : MFC requires use of Winsock2.h -

i trying build libfreenect lib files.after,successfully making solution file using cmake (following procedure described in openkinect); while trying build solution,i getting following error.

afxwin.h(112): fatal error c1189: #error : mfc requires use of winsock2.h

can give me ideas resolving this? using visual studio 2010.