讲述： 怎样应用MFC创建销毁一个窗口，使用AfxRegisterWndClass ()函数注册一个窗口类，基类及消息处理机制 -About: client area and non-client area, window and MFC, and how to create a window MFC applications, how to use MFC destroy a window, tied to an existing window, use AfxRegisterWndClass