(a)
#define _WIN32_WINNT 0x0400
#define _ATL_FREE_THREADED
#if defined(_WIN32_WCE)    
#undef _WIN32_WINNT        
#endif

(b)
#if defined(_WIN32_WCE)    
#define _ATL_FREE_THREADED
#else // desktop build
#define _WIN32_WINNT 0x0400
#define _ATL_APARTMENT_THREADED
#endif

Example 1: Change (a) to (b).