MAX_NATURAL_ALIGNMENT - NtDoc

#ifndef _PHNT_NTDEF_H
#ifndef _NTDEF_
#if defined(_WIN64) || defined(_M_ALPHA)

#define MAX_NATURAL_ALIGNMENT sizeof(ULONGLONG)

#endif
#endif
#endif
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#ifndef _PHNT_NTDEF_H
#ifndef _NTDEF_
#if defined(_WIN64) || defined(_M_ALPHA)
// ...
#else

#define MAX_NATURAL_ALIGNMENT sizeof(DWORD)

#endif
#endif
#endif
View code on GitHub