In the thesis, the OPC inner mechanism based on COM and interaction communication are analyzed firstly. Programming by Visual C++ ATL, the general OPC DA server and its interaction communication with OPC client are realized.

• 本文首先深入分析了以COM组件对象模型为基础的OPC内部机制及其通信原理,运用Visual C++ ATL技术设计了OPC DA(数据存取)通用服务器并研究实现了与OPC客户的交互通信。