说明：  VC串口通信的3种常见方法 本文介绍了在Windows平台下串行通信的实现机制，讨论了根据不同的条件用Visual C++ 设计串行通信程序的三种方法，并结合实际，实现对温度数据的接收监控
(VC serial communications common method This article describes the implementation mechanism of the serial communication under Windows platform, three methods are discussed according to different conditions with Visual C++ design of serial communication program, combined with the practical, to achieve the temperature data receive monitoring)