Problems with modal dialog and PreTranslateMessage

I've got a problem with displaying modal dialog after key pressing. I'm doing it in thath way: first any key pressing is receiving in PreTranslateMessage function. Then i'm sending new user message which i'm handling in function "OnFunctionKeyPressed" that recognizing specific key. And in the end - after pressing i.e. F7 key - i want to display modal dialog. After DoModal - i'm receiving following error stack:

Code:

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>        SPR System.exe!CWnd::AssertValid()  Line 896 + 0x24 bytes        C++
        SPR System.exe!AfxAssertValidObject(const CObject * pOb=0x025d48a8, const char * lpszFileName=0x0080c570, int nLine=2433)  Line 107        C++
        SPR System.exe!CWnd::GetTopLevelParent()  Line 2435        C++
        SPR System.exe!AfxInternalPreTranslateMessage(tagMSG * pMsg=0x002fe7f0)  Line 241 + 0x8 bytes        C++
        SPR System.exe!CWinThread::PreTranslateMessage(tagMSG * pMsg=0x002fe7f0)  Line 777 + 0x9 bytes        C++
        SPR System.exe!CSystemRTApp::PreTranslateMessage(tagMSG * pMsg=0x002fe7f0)  Line 1132        C++
        SPR System.exe!AfxPreTranslateMessage(tagMSG * pMsg=0x002fe7f0)  Line 252 + 0x11 bytes        C++
        SPR System.exe!AfxInternalPumpMessage()  Line 178 + 0x18 bytes        C++
        SPR System.exe!CWinThread::PumpMessage()  Line 900        C++
        SPR System.exe!AfxPumpMessage()  Line 190 + 0xd bytes        C++
        SPR System.exe!CWnd::RunModalLoop(unsigned long dwFlags=4)  Line 4386 + 0x5 bytes        C++
        SPR System.exe!CDialog::DoModal()  Line 584 + 0xc bytes        C++

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Error in assertion

Code:

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ASSERT(::IsWindow(m_hWnd));

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function with key handling:

Code:

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BOOL CDialogDMMenu::PreTranslateMessage(MSG* pMsg) {
        if ( pMsg->message == WM_KEYDOWN ) {
                ::SendMessage( GetSafeHwnd(), WM_DMMENUKEYPRESSED, pMsg->wParam, 0 );
        }
        return CDialog::PreTranslateMessage(pMsg);
}

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next function:

Code:

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afx_msg LRESULT CDialogDMMenu::OnFunctionKeyPressed(WPARAM wParam, LPARAM lParam ) {
        BYTE key = 0x00;
        switch ( wParam ) {
                        case VK_F1  : key=0x01; break;
                        case VK_F2  : key=0x02; break;
                        case VK_F3  : key=0x03; break;
                        case VK_F4  : key=0x04; break;
                        case VK_F5  : key=0x05; break;
                        case VK_F6  : key=0x06; break;
                        case VK_F7  : key=0x07; break;
                        case VK_F8  : key=0x08; break;
                        case VK_F9  : key=0x09; break;
                        case VK_F10 : key=0x10; break;
                        case VK_F11 : key=0x11; break;
                        case VK_F12 : key=0x12; break;
                        case VK_ESCAPE : OnCancel(); break;
                        default : break;
        }
        functionKeyPressed(key);
        return 0;
}

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and ...

Code:

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void CDialogDMMenu::functionKeyPressed(BYTE key) {
                CDialogNewValue newValDialog(key);
                if ( newValDialog.DoModal() == IDOK ) {
                        val = newValDialog.m_fValue;
                        CRealtime::getInstance()->getReader()->setCommand( command, val );
                }
}

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Where is error? Is there any other way to handle key pressing in application... Thank you. Regards...

Dont play around PreTranslateMessage override, unless absolutely needed. In your case you are just handling WM_KEYDOWN, which can be handled by OnKeyDown.

In OnFunctionKeyPressed, what if used presses ESCAPE or ANY other non-function key?

Is there a reason why you don't use WM_KEYUP/DOWN/PRESSED ? Saves you a lot of time implementing it.

edit : ajay beat me to it ;)

My application is MDI. I need to react on function keys F1-F12 but not in every window separately - but globally in application. I think that WM_KEYUP/DOWN/PRESSED working only on controls that have focus on. I tried - but it didn't work.