DLLframework extension A component that provides some plug-in functionality to a pre-defined framework. In Symbian OS, a framework extension is implemented as a polymorphic DLL.

• 框架扩展一个对于预定义的框架提供一些插入式功能的组件。在Symbian操作系统,一个框架扩展是作为被多态的DLL来实现。