Microsoft Windows 2000 API SuperBible

Creating an MDI Application

The first step in creating an MDI application is to register your window classes. You will need a window class for the MDI frame window, and a window class for each different type of MDI child window that your application supports. The class structure for an MDI frame window is filled in like the class structure for an SDI application's main window. The class structure for an MDI child window is filled in like the class structure for child windows in SDI applications, with two exceptions. First, the class structure for an MDI child window should specify an ICON because the user can minimize MDI child windows within the MDI frame window. Second, the menu name should be NULL because an MDI child window does not have ...