This serial port dual communication by adopting multifhread techmology in VC ++ programming is disucssed. The appliation of dual communication to glide windows protocal is further explored.

• 讨论了用vc+ + 中的多线程技术 ,及用多线程实现PC机串口全双工通讯的方法 ,并进一步探讨了全双工通讯在滑动窗口协议中的应用