This thesis discusses the base class design of the graphic programming interface of the VXI_BUS Test Software Platform with emphasis. In this system, developers can develop their own classes derived from service base class, which extends the ability services. 本论文主要讨论平台控件基类的设计和实现。在这个系统中,开发者可以在服务基础类之上开发自己的服务类,以获得对服务进行灵活扩展能力,处理复杂的业务关系。