Another Simple Way to Convert Modeless Dialogs to Modal


This is another simple way of converting a modeless dialog into a modal dialog.

While overriding the dialog's Create() call, get the pointer to the main frame window and disable it using EnableWindow() call.

BOOL CModelessDlg::Create( UINT nID, CWnd* pParentWnd )

// TODO: Add your specialized code here and/or call the base class


//You can get pParentWnd by calling

	AfxGetMainWnd() also.


 CDialog::Create(nID, pParentWnd);

Before destroying by "DestroyWindow()", call EnableWindow() to set it as TRUE.



// TODO: Add extra validation here




  • Pointer to Parent Window

    Posted by Legacy on 11/23/2001 12:00am

    Originally posted by: Pata

    I have a dialog in an own thread ( modeless ) that was floating around like hell until I passed a pointer to the main window in the constructor of the dialog.

    CSMSMyThread::CSMSMyThread(CWnd* pParent /*=NULL*/)
    : CDialog(CSMSMyThread::IDD, AfxGetApp()->GetMainWnd())
    m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);


    Now it's acting like a modal dialog.


  • solution for tab controls and the like

    Posted by Legacy on 02/25/2000 12:00am

    Originally posted by: Rick Kissh

    I was having trouble getting everything inside the parent frame to ignore events when it was a tab control that was the parent of the modal dialog. The following was my solution:

    // add this to your dialog constructor where pParent is the
    // parent CWnd
    GetSafeOwner( pParent, NULL )->EnableWindow( FALSE );

    // override DestroyWindow
    BOOL CCategoriesDlg::DestroyWindow()
    GetSafeOwner( GetParent(), NULL )->EnableWindow( TRUE );
    return CDialog::DestroyWindow();

  • Do it with CPropertysheet

    Posted by Legacy on 12/08/1999 12:00am

    Originally posted by: Johannes Stromberg

    How do I do the same thing with CPropertySheet?


  • Didn't quite work on NT 4.0

    Posted by Legacy on 11/11/1998 12:00am

    Originally posted by: Darryl Adams

    I tried this on NT 4.0, Visual C++ 6.0, during a command message handler, and it did not quite work. I guess disabling the parent disabled the child as well. However, calling:


    This did work, and allowed me to toggle modal/modeless at the press of a button. Switching back to modeless was done with:


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