FILETIME結構：

#ifndef _FILETIME_

#define _FILETIME_
typedef struct _FILETIME {
??? DWORD dwLowDateTime;
??? DWORD dwHighDateTime;
} FILETIME, *PFILETIME, *LPFILETIME;

#endif

ULARGE_INTEGER結構：

#if defined(MIDL_PASS)
typedef struct _ULARGE_INTEGER {
#else // MIDL_PASS
typedef union _ULARGE_INTEGER {
??? struct {
??????? DWORD LowPart;
??????? DWORD HighPart;
??? } DUMMYSTRUCTNAME;
??? struct {
??????? DWORD LowPart;
??????? DWORD HighPart;
??? } u;
#endif //MIDL_PASS
??? ULONGLONG QuadPart;
} ULARGE_INTEGER;

code：

FILETIME ft;

GetSystemTimeAsFileTime(&ft);

ULARGE_INTEGER epoch; // UNIX epoch (1970-01-01 00:00:00) expressed in Windows NT FILETIME
?? ?epoch.LowPart? = 0xD53E8000;
?? ?epoch.HighPart = 0x019DB1DE;

?? ?ULARGE_INTEGER ts;
?? ?ts.LowPart? = ft.dwLowDateTime;
?? ?ts.HighPart = ft.dwHighDateTime;
?? ?ts.QuadPart -= epoch.QuadPart;

Int64 a = ts.QuadPart/10;

a就是從1971-01-01 00:00:00以來的微妙數

總結

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