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What is the difference between unsigned long and UINT64?
I think they are the same, but I’m not sure.
The definition of UINT64 is :
typedef unsigned __int64 UINT64
(by using StdAfx.h)
UINT64 is specific and declares your intent. You want a type that is an unsigned integer that is exactly 64 bits wide. That this may be equal to an unsigned long on some platforms is coincidence.