LARGE_INTEGER TimerNumber; TimerNumber.QuadPart = -50000000;

typeef union _ LARGE_INTEGER

{

struct

{

DWORD LowPart;

LONG HighPart;

};

LONGLONG QuadPart;

} LARGE_INTEGER;

QueryPerformanceFrequency()?QueryPerformanceCounter()?SLEEP(100)?

LARGE_INTEGER litmp;

LONGLONG qt1,qt2;

double dft,dff,dfm;

QueryPerformanceFrequency(&litmp);//?

dff=(double)litmp.QuadPart;

QueryPerformanceCounter(&litmp);//?

qt1=litmp.QuadPart;Sleep(100);

QueryPerformanceCounter(&litmp);//?

qt2=litmp.QuadPart;

dfm=(double)(qt2-qt1);

dft=dfm/dff;//

QuadPart