HIWORD - NtDoc

#ifndef _NTINTSAFE_H_INCLUDED_
#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP | WINAPI_PARTITION_SYSTEM | WINAPI_PARTITION_GAMES)
#ifndef HIWORD

#define HIWORD(l)     ((WORD)((((DWORD_PTR)(l)) >> 16) & 0xffff))

#endif
#endif
#endif
View code on GitHub