Реферат: Перехват методов COM интерфейсов

public:

// реализация IStream

STDMETHOD(Seek)(_LARGE_INTEGER dlibMove, ULONG dwOrigin,

_ULARGE_INTEGER * plibNewPosition)

{

return m_spStm->Seek(dlibMove, dwOrigin, plibNewPosition);

}

// остальные методы реализованы аналогично Seek

...

STDMETHOD(Stat)(tagSTATSTG * pstatstg, ULONG grfStatFlag)

{

HRESULT hr = m_spStm->Stat(pstatstg, grfStatFlag);

if( SUCCEEDED(hr) && (grfStatFlag & STATFLAG_NONAME) == 0)

{

pstatstg->pwcsName = AtlAllocTaskWideString(m_name);

}

return hr;

}

private:

friend HRESULT CreateStreamOnHGlobal2(HGLOBAL ,BOOL ,LPOLESTR, LPSTREAM*);

HRESULT init(HGLOBAL hGlobal,BOOL fDeleteOnRelease, LPOLESTR name)

{

m_spStm.Release();

HRESULT hr = CreateStreamOnHGlobal(hGlobal, fDeleteOnRelease, &m_spStm);

if(SUCCEEDED(hr))

{

m_name = name;

}

return hr;