Simple descriptions of the DLG, app, Doc, and view classes in MFC

 

DLGIs the abbreviation of dialog, indicating the dialog box itself

 

AppClass is the SDI"ProgramThe entry is a bit like the main function of C, which is not derived from cwnd. APP indicates the application itself.

 

ViewDisplays data and provides the ability to edit and modify data. It refers to the content in the editing area that is the white middle area, which is responsible for drawing and responding to some messages.

 

DocIndicates the document class, which stores and loads data. It is a bit like a database, which stores and edits data, used for redraw of view, and saves files.

 

Generally, dynamic editing data is stored in the doc. It is not derived from cwnd. It does not inherit the MessageBox function. You can use the afxmessagebox function.