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INFO: Using Accelerators with an MFC Modeless Dialog Box

Retired KB ArticleThis article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.
Article ID:117500
Last Review:November 21, 2006
Revision:3.1
This article was previously published under Q117500

SUMMARY

To use accelerators with a modeless dialog box, override the PreTranslateMessage()function in your derived CDialog class.

MORE INFORMATION

To use accelerators with your modeless dialog box, perform the following steps:

1.Create a modeless dialog box. For additional information, please see the following article in the Microsoft Knowledge Base:
103788 (http://support.microsoft.com/kb/103788/EN-US/) Creating a Modeless Dialog Box with MFC Libraries
2.Insert this sample code into the files listed above the code:
   // .h file with your derived CDialog class.
   class CModeless : public CDialog
   {
      .
    public:
      virtual BOOL PreTranslateMessage(MSG*);
      .
   };

   //.cpp file.
   BOOL CModeless::PreTranslateMessage(MSG* pMsg)
   {
      HACCEL hAccel =
      ((CMainFrame*)AfxGetApp()->m_pMainWnd)->GetAccelTable();
      if(!(hAccel &&
           ::TranslateAccelerator(AfxGetApp()->m_pMainWnd->m_hWnd, hAccel,
                                  pMsg)))
           return CDialog::PreTranslateMessage(pMsg);
      else
         return TRUE;
   }

   // Mainfrm.h file, where CMainFrame is the main window class.
   HACCEL CMainFrame::GetAccelTable() { return m_hAccelTable; }
						
3.Create the accelerators with App Studio, or with Resource View from the Project Workspace in Visual C++ 32-bit Edition, version 4.0. The accelerators should be in the IDR_MAINFRAME accelerator table. They should also have the same ID as the controls or menu items with which they are associated.

APPLIES TO
Microsoft Foundation Class Library 4.2, when used with:
  Microsoft Visual C++ 1.0 Professional Edition
  Microsoft Visual C++ 1.5 Professional Edition
  Microsoft Visual C++ 1.51
  Microsoft Visual C++ 1.52 Professional Edition
  Microsoft Visual C++ 1.0 Professional Edition
  Microsoft Visual C++ 2.0 Professional Edition
  Microsoft Visual C++ 2.1
  Microsoft Visual C++ 4.0 Standard Edition

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Keywords: 
kbacceleratorkey kbarchitecture kbdlg kbinfo kbkeyaccel kbuidesign KB117500

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