Re: Back to CDialog from child window ?

From:

Dan Bloomquist <public21@lakeweb.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Tue, 14 Aug 2007 23:05:12 GMT

Message-ID:

<Iyqwi.14050$B25.7150@news01.roc.ny>

RAN wrote:

Hi RAN,

void CTextEntry::OnChar(UINT nChar, UINT nRepCnt, UINT nFlags)
{
    // TODO: Add your message handler code here and/or call default

    if(nChar == VK_RETURN)
    {
        GetWindowText(t_TextEntry.o_TextEntryStr);
        SetWindowText("");

        if(t_TextEntry.o_TextEntryStr.IsEmpty () == FALSE)
            ::SendMessage(hWnd,UDM_ONTEXTENTRY_COMPLETED,1,
(long)&t_TextEntry);

Here you are passing a pointer to the object.

     }

    CEdit::OnChar(nChar, nRepCnt, nFlags);
}

and:

LRESULT CClientDlg::OnTextEntryCompleted(WPARAM wParam, LPARAM lParam)
{

    if(wParam == 1)
    {
        t_TextEntry = (TEXTENTRY&) lParam;

Here you are casting the pointer to a reference. Do:
t_TextEntry = *(TEXTENTRY*) lParam;
or more officially:
t_TextEntry= *reinterpret_cast<TEXTENTRY*>( lParam );

And by:
TEXTENTRY& t_TextEntry= *reinterpret_cast<TEXTENTRY*>( lParam );
You avoid a copy constructor;

If you want a reference. But I would keep it a pointer.

And you can:
ASSERT_NULL_OR_POINTER( ... )

Best, Dan.

     // o_ChatTextEntry.InsertText (LPCSTR(t_TextEntry.o_TextEntryStr));
    }

    return 0;
}

the contents of TEXTENTRY is garbage !? If i create a PTEXTENTRY
dynamically the contents is ok ? Why ?