ILLUSTRATION OF MDI APPLICATION USING A PROJECT

1. Choose the MDI option while generating the project by using the Appwizard.

2. Add the WM_LBUTTONDOWN message for the view object id

3. Type the below coding in the left button down

CMDIChildWnd *pChild = (CMDIChildWnd *) GetParentFrame();

pChild->MDIMaximize ();

CMDIFrameWnd *pParent = pChild-> GetMDIFrame();

pParent->MDINext ();

4. Construct and execute the project.

5. While you click a File and then the New menu item another child window will open as shown in figure.

6. This output will switch between the MDI 1 and 2. Whenever you click the left button down, the GetParentFrame() will return the handle of the parent window. The address is type cast to CMDIChildWnd. The function MDIMaximize () will display the window on full screen. The GetMDIFrame() will return the handle of the MDI window. The function MDINEXT() exhibits the next MDI window.

Figure: MDI

If you click the New continuously the multiple windows keeps opening. For a MDI application Appwizard derives the CMainFrame class from the CMDIFrameWnd.