OCX、COMコンポーネントのイベントの接続、切断

// AtlAdvise() と等価

DWORD ConnectSink(LPUNKNOWN punkSource, REFIID iid, LPUNKNOWN punkSink)

{

    ASSERT(punkSource != NULL);

    ASSERT(punkSink);

    LPCONNECTIONPOINTCONTAINER pConnPtCont;

    if( SUCCEEDED(punkSource->QueryInterface(IID_IConnectionPointContainer, (LPVOID*)&pConnPtCont)) )

    {

        ASSERT(pConnPtCont != NULL);

        LPCONNECTIONPOINT pConnPt = NULL;

        DWORD dwCookie = 0;

        if (SUCCEEDED(pConnPtCont->FindConnectionPoint(iid, &pConnPt)))

        {

            ASSERT(pConnPt != NULL);

            HRESULT hr = pConnPt->Advise(punkSink, &dwCookie);

            pConnPt->Release();

        }

        pConnPtCont->Release();

        return dwCookie;

    }

    return 0;

}

// AtlUnadvise() と等価

void DisconnectSink(LPUNKNOWN punkSource, REFIID iid, DWORD dwCookie)

{

    ASSERT(punkSource);

    if (dwCookie == 0)

    {

        ASSERT(0);

        return;

    }

    ASSERT(punkSource != NULL);

    LPCONNECTIONPOINTCONTAINER pConnPtCont;

    if( SUCCEEDED(punkSource->QueryInterface(IID_IConnectionPointContainer, (LPVOID*)&pConnPtCont)) )

    {

        ASSERT(pConnPtCont != NULL);

        LPCONNECTIONPOINT pConnPt = NULL;

        if (SUCCEEDED(pConnPtCont->FindConnectionPoint(iid, &pConnPt)))

        {

            ASSERT(pConnPt != NULL);

            pConnPt->Unadvise(dwCookie);

            pConnPt->Release();

        }

        pConnPtCont->Release();

    }

}