最近有朋友要mmTimer的源码，这里便是 mmTimer的实现源码，包括VB（ocx），VC（dll），注意是单线程，需要自己改多线程-Recently, a friend to mmTimer the source, here is the realization of mmTimer source, including VB (ocx), VC (dll), attention is single-threaded, multi-thread needs its own reform