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class CMyApp : public CWinApp
{
public:
    BOOL InitInstance();
    int ExitInstance();

static LRESULT CALLBACK GetMessageProc(int nCode, WPARAM wParam, LPARAM lParam);
    HHOOK  m_hHook;

};

LRESULT CALLBACK CMyApp::GetMessageProc(int nCode, WPARAM wParam, LPARAM lParam)
{
    AFX_MANAGE_STATE(AfxGetStaticModuleState());
    LPMSG lpMsg = (LPMSG)lParam;

if(AfxGetApp()->PreTranslateMessage(lpMsg))
    {
        lpMsg->message = WM_NULL;
        lpMsg->lParam = 0L;
        lpMsg->wParam = 0;
    }

// Passes the hook information to the next hook procedure in the current hook chain.
    return ::CallNextHookEx(theApp.m_hHook, nCode, wParam, lParam);
}

BOOL CMyApp::InitInstance()
{
    BOOL bInit = CWinApp::InitInstance();
    if (bInit)
    {
        m_hHook = ::SetWindowsHookEx(WH_GETMESSAGE,
                                     GetMessageProc,
                                     AfxGetInstanceHandle(),
                                     GetCurrentThreadId());

ASSERT(m_hHook);
    }

return bInit;
}

int CMyApp::ExitInstance()
{
    UnhookWindowsHookEx(m_hHook);
    return CWinApp::ExitInstance();
}