int UsSleep(int us);//返回实际的微秒延时时间

 //参数一表示 需要等待的时间 微秒为单位

 int UsSleep(int us)

 {

     //储存计数的联合

     LARGE_INTEGER fre;

     //获取硬件支持的高精度计数器的频率

     if (QueryPerformanceFrequency(&fre))

     {

        LARGE_INTEGER run,priv,curr,res;

         run.QuadPart = fre.QuadPart * us / ;//转换为微妙级

         //获取高精度计数器数值

         QueryPerformanceCounter(&priv);

         do

         {

             QueryPerformanceCounter(&curr);

         } while (curr.QuadPart - priv.QuadPart < run.QuadPart);

         curr.QuadPart -= priv.QuadPart;

         int nres = (curr.QuadPart *  / fre.QuadPart);//实际使用微秒时间

         return nres;

     }

      return -;//返回错误值。

 }

timeBeginPeriod();

Sleep();

DWORD dwTime = ::timeGetTime();

timeEndPeriod();