有时候我们需要CAA的程序代码进行封装，这样我们给客户提供的只是头文件、lib库文件和dll动态库文件，不会暴露程序源代码。还有，如果我们需要对系统原有的功能进行扩展，即对系统对象的某个接口进行重新实现，在这些情况下，就要用到CAA开发框架里的Interface、Component和Component Extension的功能，本文介绍的是Interface和Component的使用，通过这两者，我们可以实现对代码的封装-Sometimes we need packaging CAA program code, so we offer only the header files, lib files and dll library dynamic library files, program source code is not exposed. Also, if we need to extend the functionality of the original system, that is the object of an interface on the system re-implementation, in these circumstances, we must use CAA development fr a mework of Interface, Component, and Component Extension functions This article describes the Component Interface and used by both, we can achieve the code package