software reuse;  MIS;  class libraries;  components;  DDE;  OLE;  COM;  ActiveX

In the process of developing the electricity business management information system, in view of the changeability of requirements in software development, based on software reuse technology, through object code-level reuse, class libraries, components and other methods, various reusable soft components with different "levels" are developed, and the system development is completed in the continuous creation, reuse and combination of soft components. This method can effectively improve the overall development efficiency of software, ensure software quality, and also facilitate the reuse of developed software resources by software developers.