RichEdit and SetSel when tabbing

[ovidiucucu]

Indeed, for rich-edit control, VS6 Class Wizard shows both EN_SETFOCUS and NM_SETFOCUS in the list, although Rich-edit 1.0 which can be taken from VS6 toolbox, sends only EN_SETFOCUS (at least according to the documentation).
Moreover, it maps both notifications using ON_NOTIFY macro, which is not correct.
Let's take it as a little bug. If you still are using old VS6.0, then map manually the rich-edit control notifications. That's it.

Beware of the message handlers prototype! VS6 performs C-style cast when uses function pointers involved in message mapping. If you manually provide a wrong prototype, let's say void OnSetfocusSomeCtrl(NMHDR* pNMHDR, LRESULT* pResult) the program compiles but may crash at run-time (it crashes for sure in release build). Newer versions of Visual Studio resolved this issue by making static_cast.

Putting all together, including the advices of my colleagues, the following sample must compile, run and work with no problems:

class CMyDialog : public CDialog
{
   // ...
   CRichEditCtrl m_richeditTest;
   // ...
   // ...
   afx_msg void OnSetfocusRichEditTest();
   DECLARE_MESSAGE_MAP()
};

void CMyDialog::DoDataExchange(CDataExchange* pDX)
{
   // ...
   // ...
   DDX_Control(pDX, IDC_RICHEDIT_TEST, m_richeditTest);
   //}}AFX_DATA_MAP
}
   // ...
   // ...
   ON_EN_SETFOCUS(IDC_RICHEDIT_TEST, OnSetfocusRichEditTest)
END_MESSAGE_MAP()

void CMyDialog::OnSetfocusRichEditTest()
{
   m_richeditTest.SetSel(0, 0);
}

Of course, must not forget to call AfxInitRichEdit in InitInstance of aplication (derived from CWinApp) class.