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:


Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • On-demand Event Event Date: September 23, 2015 The cloud is not just about a runtime platform for your projects – now, you can do your development in the cloud, too. Check out this webcast to learn how the cloud improves your development experience and team collaboration. Join Dana Singleterry, Principal Product Manager for Oracle Dev Tools, as he discusses how to simplify every aspect of the development lifecycle, including requirements gathering, version management, code reviews, build automation, and …

  • As the mobile enterprise marketplace expands and customer needs grow more diverse, Samsung recognizes that solution partners and developers play an essential role by continually innovating to meet their customers' needs. Samsung works to provide these developers and partners with the latest tools and resources needed to create these solutions. Read this program guide to learn how the Samsung Enterprise Alliance Program provides partners and developers with Samsung enterprise software development kits (SDKs) …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date