主要就是GetProcessTimes和GetThreadTimes这两个函数，它们获得的时间都是FILETIME，下面的程序包含了获得两个FILETIME的差（ms）的办法。
如果要显示FILETIME，可以用FileTimeToSystemTime这个函数（http://msdn.microsoft.com/en-us/library/windows/desktop/ms724280(v=vs.85).aspx）
补充，这里有一个跨平台的版本：
（http://nadeausoftware.com/articles/2012/03/c_c_tip_how_measure_cpu_time_benchmarking）
1 #include "stdafx.h" 2 #include <windows.h> 3 #include <iostream> 4 5 int GetMSBetweenFileTime(PFILETIME ft1, PFILETIME ft2) 6 { 7 ULARGE_INTEGER ul1; 8 ULARGE_INTEGER ul2; 9 10 ul1.LowPart = ft1->dwLowDateTime; 11 ul1.HighPart = ft1->dwHighDateTime; 12 13 ul2.LowPart = ft2->dwLowDateTime; 14 ul2.HighPart = ft2->dwHighDateTime; 15 16 ULARGE_INTEGER uliRetValue; 17 uliRetValue.QuadPart = ul2.QuadPart - ul1.QuadPart; 18 uliRetValue.QuadPart /= 10; 19 uliRetValue.QuadPart /= 1000; 20 21 return int(uliRetValue.QuadPart); 22 } 23 24 int _tmain(int argc, _TCHAR* argv[]) 25 { 26 FILETIME cpuTime; 27 FILETIME sysTime; 28 FILETIME createTime; 29 FILETIME exitTime; 30 31 BOOL c1 = GetProcessTimes(GetCurrentProcess(), &createTime, &exitTime, &sysTime, &cpuTime); 32 33 for(int i = 0; i < 1000; i++) 34 std::cout << i << std::endl; 35 36 Sleep(3000); 37 FILETIME cpuTime2; 38 FILETIME sysTime2; 39 FILETIME createTime2; 40 FILETIME exitTime2; 41 42 BOOL c2 = GetProcessTimes(GetCurrentProcess(), &createTime2, &exitTime2, &sysTime2, &cpuTime2); 43 44 std::cout << "sysTime:" << GetMSBetweenFileTime(&sysTime, &sysTime2) << std::endl; 45 std::cout << "cpuTime:" << GetMSBetweenFileTime(&cpuTime, &cpuTime2) << std::endl; 46 std::cout << "Done"; 47 }