一个封装得比较完整的COM串口通讯类接口，支持同步、异步操作，调用方法也简便，在BC、VC,、GCC等下编译通过，不过用时候需要配置一些参数，否则会报错导致通讯失败。

-Get a more complete package COM serial communications interface, supports synchronous, asynchronous operation, call the method is also simple, in BC, VC,, GCC wait for the next compiler, but by the time you need to configure some parameters, otherwise it will lead to communication failure error .