error C2065: 'WS_EX_NOACTIVATE' : undeclared identifier

i got the above error when executing the program . i included the header file winuser.h i want to know what is the problem.

 

Its defined when you have the Windows version higher than 5.0

Code:

#if(_WIN32_WINNT >= 0x0500)
#define WS_EX_COMPOSITED        0x02000000L
#define WS_EX_NOACTIVATE        0x08000000L
#endif /* _WIN32_WINNT >= 0x0500 */