One is that all of the key components are encapsulated intoseparate ActiveX DLL components, which are designed with the COM standardmade by Microsoft Co.

• 为了提高本系统的扩展性，在设计中一方面采用了Microsoft公司的组件对象模型（COM）技术标准，将系统中的一些关键组件封装在不同的ActiveXDLL中。