MSComm 控件通过串行端口传输和接收数据，为应用程序提供串行通讯功能。MSComm控件在串口编程时非常方便，程序员不必去花时间去了解较为复杂的API函数，而且在VC、VB、Delphi等语言中均可使用。 Microsoft Communications Control（以下简称MSComm）是Microsoft公司提供的简化Windows下串行通信编程的ActiveX控件，它为应用程序提供了通过串行接口收发数据的简便方法。具体的来说，它提供了两种处理通信问题的方法：一是事件驱动(Event－driven)方法，一是查询法。-MSComm through serial port transmission and reception of data and application procedures for serial communications capabilities. MSComm in serial programming extremely convenient programmer does not have to spend time to understand the more complex API function, but also in VC, VB, Delphi, and other languages may be used. Microsoft Communications Control (hereinafter referred to MSCom m) is provided by Microsoft to simplify Windows programming of serial communication Active X-Control, which provides for the application procedures for the adoption of Serial Data Interface Transceiver simple method. Specifically, it provides a communication problem handled in two ways : First, the event-driven (Event-driven), First Act inquiries.