Using Accelerators with an MFC Modeless Dialog Box

WINDOWS             | WINDOWS NT

The information in this article applies to:

• The Microsoft Foundation Classes (MFC) included with:

      - Microsoft Visual C++ for Windows, versions 1.0, 1.5, 1.51, and
        1.52
      - Microsoft Visual C++ 32-bit Edition, versions 1.0, 2.0, 2.1, and 4.0
  

SUMMARY

To use accelerators with a modeless dialog box, override the function "PreTranslateMessage()" 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:

         ARTICLE-ID: Q103788
         TITLE     : 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, 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.