使用MFC实现COM组件时，经常节省许多开发时间。例如，使用AppWizard生成的基于MFC的COM dll工程，已经自动的提供了DllRegisterServer功能的实现。然而，却没有自动生成DllUnregisterServer功能。一般情况下，DllUnregisterServer对于程序是不可缺少的，因为一个完整的程序，不仅需要自注册功能，同时也需要自卸载功能。-use MFC COM, we often save many development time. For example, the use of AppWizard generated based on the MFC COM dll, has provided automatic DllRegisterServer functions. However, they did not automatically generate DllUnregisterServer functions. Under normal circumstances, the procedure for DllUnregisterServer is indispensable. because a complete set of procedures, not only from the registration function, but also need to uninstall feature since.