在本文提供的串口通信程序设计中，除了PC与PC串口通信外，PC与单片机、PC与智能仪表、PC与PLC、PC与GSM短信模块等串口通信任务的实现均采用MSComm控件。-In this article, serial communication program designed to provide, in addition to PC and PC serial communication peripherals, PC and SCM, PC and smart instrumentation