mydefineddialog::PreTranslateMessage doesn't get called

I'm tryng to capture keydown events in a dialog by overriding the CDialog::PreTranslateMessage method. My code is:

BOOL ControlDialog::PreTranslateMessage(MSG* pMsg)
{
      if (pMsg->message==WM_KEYDOWN)
      {
            MessageBox("I did it!");
      }
      return CDialog::PreTranslateMessage(pMsg);
}

but it never gets called. Anybody knows why?
hammetAsked:
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inoxCommented:
Modal dialog messages are handled by IsDialogMessage so if the message is for that modal dialog, PretranslateMessage is not called, because the message is completely handled by IsDialogMessage.

Is a ordinary message-handler (onKeydown) not suitable?

AlexFMCommented:
This must work. Search for typo or something else which prevents this function to be called. Check whether function is called at all:

BOOL ControlDialog::PreTranslateMessage(MSG* pMsg)
{
    TRACE(_T("PreTranslateMessage\n"));

    if (pMsg->message==WM_KEYDOWN)
    {
         TRACE(_T("WM_KEYDOWN\n"));
    }
    return CDialog::PreTranslateMessage(pMsg);
}
hammetAuthor Commented:
It is not a modal dialog and the ordinary message-handler (onKeydown) doesn't work but for example the left mouse button message-handler works. Function isn't called, i've checked it.
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AlexFMCommented:
Try to overwrite CWinApp::PreTranslateMessage and catch message there.
hammetAuthor Commented:
Overwriting CWinApp::PreTranslateMessage doesn't work.
More tips about my problem:
   - the dialog's parent window is an opengl window
   - the opengl window has its own windowproc event handler.
   - the opengl window windowproc don't catch that keydown event.
   - I can't get called ControlDialog::PreTranslateMessage or ControlDialog::OnKeyDown but I can catch ControlDialog::OnMouseWheel for example.
inoxCommented:

If CWinApp::PreTranslateMessage there seems to be another modal dialog however there seems to be someting modal but not the mainapp.
Maybe
http://search.microsoft.com/search/results.aspx?View=msdn&st=a&qu=Q126874&c=0&s=4
can help

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hammetAuthor Commented:
I've found the cause of the problem. The main opengl window has this loop:
   while (!pShutdown) {
      if (PeekMessage(&msg,NULL,0,0,PM_REMOVE)) {
         if (msg.message==WM_QUIT)
      pShutdown=true;
         else {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
         }
      }
   }
Child window keydown event is catched here (I've traced it). It is supossed that DispatchMessage sends message to child window but ControlDialog::PreTranslateMessage, ControlDialog::OnKeyDown and ControlDialog::OnChar don't get called. How can I perform this?
I'll give 50 points to inox (the best answer by the moment). I'll give 200 point to the one who gives me the final answer to this question.
inoxCommented:

the ControlDialog must have the mainwindow as parent, whether directly or indirectly, is that the case?

Goto the file WINCORE.CPP
in line 2653 find the function
BOOL PASCAL CWnd::WalkPreTranslateTree(HWND hWndStop, MSG* pMsg)
(here the PreTranslateMessage calls are routed)
set a breakpoint there does it stop?
if:
you can follow up the
for (HWND hWnd = pMsg->hwnd; hWnd != NULL; hWnd = ::GetParent(hWnd))
loop to check your dialog is in the chain
if not:
In the file THRDCORE.CPP (MFC Sources) the is the function
BOOL CWinThread::PreTranslateMessage(MSG* pMsg)
set a bp there and see if it stops
if:
 follow to the WalkPreTranslateTree call
if not:
 in the same file goto the
BOOL CWinThread::PumpMessage()
here it must stop, check whats going on



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