Q142317: HOWTO: How to Create a Minimized/Maximized MDI Child Window

Article: Q142317
Product(s): Microsoft C Compiler
Version(s): 1.0,1.5,1.51,1.52,2.0,2.1,2.2,4.0
Operating System(s): 
Keyword(s): kbDocView kbMFC KbUIDesign kbVC kbGrpDSMFCATL
Last Modified: 16-AUG-2001

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The information in this article applies to:

- The Microsoft Foundation Classes (MFC), used with:
   - Microsoft Visual C++ for Windows, 16-bit edition, versions 1.0, 1.5, 1.51, 1.52 
   - Microsoft Visual C++, 32-bit Editions, versions 1.0, 2.0, 2.1, 2.2, 4.0 
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SUMMARY
=======

To create an initially minimized or maximized document in an MDI application,
derive a class from CMDIChildWnd and override ActivateFrame(). In the
ActivateFrame() member function, call the ActivateFrame() function in the base
class, and pass SW_SHOWMINIMIZED or SW_SHOWMAXIMIZED as the parameter.

MORE INFORMATION
================

If you're using a version of Visual C++ earlier than 4.0, it is necessary to
derive a class from CMDIChildWnd and substitute the new class name in the
CMultiDocTemplate used in your CWinApp-derived InitInstance() function. To do
so, use ClassWizard to add a class called CChildFrame derived from CMDIChildWnd.
Include the header file in your application's .cpp file. Then change the line
indicated below in your InitInstance() function:

      CMultiDocTemplate* pDocTemplate;
      pDocTemplate = new CMultiDocTemplate(
          IDR_MDIAPPTYPE,
          RUNTIME_CLASS(CMDIAppDoc),
          RUNTIME_CLASS(CChildFrame), // change CMDIChildWnd to CChildFrame
          RUNTIME_CLASS(CMDIAppView));
      AddDocTemplate(pDocTemplate);

In Visual C++ 4.0, deriving a class from CMDIChildWnd is not required because one
is already provided for you.

In the CChildFrame class, override the ActivateFrame() member function as
follows:

  void CChildFrame::ActivateFrame(int nCmdShow)
  {
      if (nCmdShow == -1)
          nCmdShow = SW_SHOWMAXIMIZED;

      CMDIChildWnd::ActivateFrame(nCmdShow);
  }

Additional query words: kbinf 1.00 2.00 2.10 2.20 4.00 1.50 PreCreateWindow CREATESTRUCT CChildFrame Maximized WS_MAXIMIZE Cs.style

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Keywords          : kbDocView kbMFC KbUIDesign kbVC kbGrpDSMFCATL 
Technology        : kbAudDeveloper kbMFC
Version           : :1.0,1.5,1.51,1.52,2.0,2.1,2.2,4.0
Issue type        : kbhowto

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