精确计算代码执行的时间差（毫秒）-QueryPerformanceFrequency。

LARGE_INTEGER   countstart_for;
        LARGE_INTEGER   countend_for;   
        __int64   timediff_for;   
        LARGE_INTEGER   frequent_for;
        double   dsec_max = 0;
        double   dsec_min = 0;

        QueryPerformanceCounter(&countstart_for); 
        TRACE("Timer (for) Started !/n");   
        for (long i = 0; i< 10000; i++)
        {
            LARGE_INTEGER   countstart;
            LARGE_INTEGER   countend;   
            __int64   timediff;   
            LARGE_INTEGER   frequent;   
            QueryPerformanceCounter(&countstart);   
            TRACE("Timer Started !/n");   

            //// TODO: 在此处为应用程序的行为编写代码。
            _tsetlocale(LC_ALL, _T(""));
            //char * wsabuff = "中fadfdf国人";
            char * wsabuff = "楓谷測試";
            // Convert ANSI to Unicode

            //第一步取得需要转换的字符的长度
            unsigned long lLen = strlen(wsabuff);

            //第二步取得转换成WCHAR，所需要的字符数
            int cch = MultiByteToWideChar(CP_ACP,0, wsabuff, lLen, NULL, 0); 

            //第三步定义数组并清零
            WCHAR * wszBuffer = new WCHAR[cch + 1]; 
            ZeroMemory((char *)wszBuffer, (cch+1)*sizeof(wszBuffer[0]));

            //第四步转换
            MultiByteToWideChar( CP_ACP, 0, wsabuff, lLen + 1, wszBuffer, cch);
            TRACE(L"%s/n", wszBuffer);

            BYTE charUTF8[200];
            ZeroMemory(charUTF8, 200);
            WideCharToMultiByte(CP_UTF8, 0, wszBuffer, -1, (LPSTR)charUTF8, 200,   NULL,   NULL   ); 

            delete [] wszBuffer;

            CString str = L"123， 456789， 1223， 0000-88191463  13000000000";
            CString strToken = L"， ";
            int nStartIndex = 0;

            for (int nEndIndex=0;nEndIndex = str.Find(strToken, nStartIndex), 
                nEndIndex >=0 ; 
                nStartIndex = nEndIndex + strToken.GetLength())
            {
                CString strTemp = str.Mid(nStartIndex, nEndIndex - nStartIndex);
                //TRACE(L"%s/r/n", strTemp);
            }
            CString strTemp = str.Mid(nStartIndex);
            TRACE(L"%s/r/n", strTemp);

            QueryPerformanceCounter(&countend);   
            timediff   =   (__int64)countend.QuadPart-(__int64)countstart.QuadPart;   
            QueryPerformanceFrequency(&frequent);   
            double   dsec   =   (double)timediff/(double)frequent.QuadPart;
            TRACE("Timer End. Elapsed time:%f(second)/n",dsec);   
            if (dsec < dsec_min || dsec_min == 0)
                dsec_min = dsec;
            if (dsec > dsec_max || dsec_max == 0)
                dsec_max = dsec;
        }

        QueryPerformanceCounter(&countend_for);   
        timediff_for   =   (__int64)countend_for.QuadPart-(__int64)countstart_for.QuadPart;   
        QueryPerformanceFrequency(&frequent_for);   
        double   dsec_for   =   (double)timediff_for/(double)frequent_for.QuadPart;   
        TRACE("Timer (for) End. Elapsed time:%f(s), min=%f(s), max=%f(s)/n",dsec_for, dsec_min, dsec_max);