putPin::CheckMediaType(const CMediaType *pmt ) {     HRESULT hr = m_pTIPFilter->CheckInputType(pmt);     if (hr!=S_OK) return hr;      if( m_pTIPFilter->m_pOutput->IsConnected() )         return m_pTIPFilter->m_pOutput->GetConnected()->QueryAccept( pmt );     else         return S_OK;  } // CheckMediaType   /