This paper describes how to use Multiple Thread technology and TAPI function to manage communication under Borland C ++Builder environment, and realize Full Duplex MODEM communication.

• 文中叙述了如何在Borland C~(++) Builder开发系统下利用多线程技术和TAPI函数来管理通信链路,实现MODEM全双工通信的编程技术。