It introduces the communication program based on Windows and Dos, which can be used to connect CAD/CAD with NC system. Supported by the cushion, the DNC will be realized.

• 简要介绍了Windows与DOS不同平台下的通讯程序 ,并应用于CAD/CAM系统与数控系统的通讯 ,运用循环缓冲技术实现数控系统的DNC。