【摘要】 由Microsoft提出的COM组件技术,产生了一种新的软件模型-组件化软件结构,使一个庞大的应用程序可以分成多个组件,通过相互之间的接口完成实际的任务,同时根据系统的外界软硬件环境变化或用户的需求,可对单个组件进行修改,重新组合得到新的升级软件。在介绍包容和聚合这两种重用机制基本概念的基础上,以OPC技术中的OPC对象为例,用C++直接实现COM组件的重用。阐述了COM组件重用在系统开发中的重要性。更多还原

【Abstract】 COM component technology that Microsoft puts forward brings out a new software module,which has component software structure.It divides a large application into some components,and finishes the practical task through mutual interfaces.Based on the variety of software-hardware environment in system or the requirement of clients,a single component can be modified and an upgrade software can be acquired.The basic concepts of two reusabilities with containment and aggregation are introduced,and OPC objects reuse in C++ with OPC objects in OPC Server are implemented.Furthermore,the importance of OPC objects reuse in system development is demonstrated.更多还原