//<Nick> 17.07.2004
//    DWORD dwGITCookie = (DWORD)_CDV::GetUnknown(dwCookie);
    DWORD dwGITCookie = reinterpret_cast<DWORD>(m_vec.GetUnknown(dwCookie)); 

.......

//<Nick 17.07.2004>
//    pend->dwCookie = _CDV::GetCookie(reinterpret_cast<IUnknown **>(pDWCookie));
    pend->dwCookie = m_vec.GetCookie(reinterpret_cast<IUnknown **>(pDWCookie));