PRB: Rich Edit Control Message Handlers Are Not Called

• Microsoft Visual C++, 32-bit Editions, versions 5.0, 6.0

SYMPTOMS

There is a problem with the message-map entries that ClassWizard creates to handle the following Rich Edit control messages: EN_SETFOCUS, EN_KILLFOCUS. The message-map entry created by ClassWizard does not call the handler for these messages.

CAUSE

The wrong message map entries are added.

RESOLUTION

Replace the message-map entries generated for EN_SETFOCUS and EN_KILLFOCUS with the following entries:

ON_EN_SETFOCUS(IDC_RICHEDIT1, OnSetfocusRichedit1)

ON_EN_KILLFOCUS(IDC_RICHEDIT1, OnKillfocusRichedit1)

STATUS

Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article.

MORE INFORMATION

Steps to Reproduce Behavior

1. Use the MFC AppWizard to create a dialog-based application.



2. Drag a RichEdit control from the Controls palette onto the Dialog template using the Dialog Resource Editor.



3. Open ClassWizard, and choose IDC_RICHEDIT1 for the ObjectID. To add message handlers for the EN_SETFOCUS and the EN_KILLFOCUS messages, highlight the message and click Add Function.



4. Click OK, and look at the code. The following entry appears in the message-map if you selected EN_SETFOCUS:

   ON_NOTIFY(EN_SETFOCUS, IDC_RICHEDIT1, OnSetfocusRichedit1)

   However, this message-map entry should be:

   ON_EN_SETFOCUS(IDC_RICHEDIT1, OnSetfocusRichedit1)

   The following entry is also in the message-map if you selected EN_KILLFOCUS:

   ON_NOTIFY(EN_KILLFOCUS, IDC_RICHEDIT1, OnKillfocusRichedit1)

   However, this message-map entry should be:

   ON_EN_KILLFOCUS(IDC_RICHEDIT1, OnKillfocusRichedit1)




5. If you build and run this project to see the problematic behavior, remember to add the line AfxInitRichEdit(); in the InitInstance()

   
      function of the CWinApp derived class. 




6. You can use the default handler created by ClassWizard and add a TRACE statement. Following is an example for the EN_KILLFOCUS message:

   
         void CMyDialog::OnSetfocusRichedit1(NMHDR* pNMHDR, LRESULT* pResult)
         {
            TRACE("This function will never be called\n");
            *pResult = 0;
         } 




7. The TRACE statement does not execute when you run a Debug build.

REFERENCES

For additional information, please see the following articles in the Microsoft Knowledge Base:

Q166132 PRB: Dialog With RichEdit May Fail During Creation

Q165744 BUG: RichEditCtrl IDs Not Shown in Member Variables Tab

Additional query words: CRichEditCtrl EN_SETFOCUS EN_KILLFOCUS RichEdit Class Wizard

Keywords : kbwizard kbCtrl kbVC500 kbVC600
Version : WINNT:5.0,6.0;win95:5.0,6.0
Platform : Win95 winnt
Issue type : kbbug