The Research Of COM Component Programing Design Method

In the early times of computer softeware development, an application is usually a single application. The more complex the application is, the larger the program is, and the harder the system is developed. Furthermore, the update period of version is longer. In order to resolve the software reuse, shorten the software programming, reduce the maintenance cost, and implement dynamic update of application, a new software model—component software structure comes out. Nowadays, component object model (COM) from the corporation of Microsoft is one of the mature software component technologies and widely applied in its operation system and application softwares. In the areas of distributed computation, Internet, B/S structure development, audio-vedio processing, and so on, COM technology is also used largely and perfected.In order to understand the COM thought deeply, use it to develop COM applications better, the thesis makes a deep and systemic reserch and explain of the infrastructure mechanism of COM. Based on the conceptions, content, significance of software component, the thesis elaborates the COM model and the bottom implementation details of COM, and improved the COM resuse model. Then, the thesis introduces the COM extension—COM+.Finally, the thesis supplies an application—the Judging System of Figure Skating Base-on COM. The improved COM reuse model was applied in the system, which makes it more flexible. So, it contributes to the update maintanence in the future and completely embodies the superiorities of the design idea of COM.