Microsoft Windows 2000 API SuperBible

The MDI Frame Window

The MDI frame window is responsible for creating the MDI client window, usually during processing of the WM_CREATE message. You create the MDI client window using the preregistered window class MDICLIENT as shown in Listing 27.3. The MDI client window will dynamically alter one of the pop-up menu items in the frame window's menu bar, so you must pass the menu handle for the pop-up menu that the MDI client window is to alter as the final parameter to the CreateWindowEx function. For more detailed information on how the MDI client window alters this pop-up menu, refer to "Menus in MDI Applications" later in this chapter.

Code Listing 27.3. Creating the MDI Frame Window

HWND hWndClient = NULL; // An ID that is different than ...