利用C++ Builder进行精确计时.Microsoft公司在Win32 API函数库中已经为用户提供了一组用于高精度计时的底层函数，如果用户使用得当，计时精度可到1ms。这个计时精度、对于一般的实时系统控制完全可以满足要求。-The use of C++ Builder precise timing. Microsoft Corporation in the Win32 API function library has been to provide users with a group of high-precision timing for the underlying function, if the user used appropriately, time accuracy can be 1ms. The timing accuracy, for the average real-time system control to meet the requirements completely.