说明：  MSComm 控件在基于单文档中的应用 MSComm 作为一个串行通讯控件为程序员串口通讯编程节省了很多时间。在基于对话框的应用中加入一个MSComm控件非常简单。
(MSComm control in single-document-based application MSComm as a serial communication control for the serial communication programming programmers save a lot of time. Dialog-based application to add a MSComm control is very simple.)