高精度定时器SetWaitableTimer的使用例程，精度可达到100ns,最短定时周期1ms。-The use of high-precision timer SetWaitableTimer routines, precision can reach 100ns, the minimum timing cycle, 1ms.

vb写的时间延迟模块，比sleep好用，是setwaitabletimer-vb write time delay module, easy to use than sleep, is setwaitabletimer