CComBSTR::WriteToStream

HRESULT WriteToStream( IStream* pStream );

Return Value

A standard HRESULT value.

Parameters

pStream

[in] A pointer to the IStream interface on a stream.

Remarks

Saves the m_str member to a stream.

Example

//implementation of IDataObject::GetData()
STDMETHODIMP CPolyCtl::GetData(FORMATETC *pformatetcIn, STGMEDIUM *pmedium)
{
   HRESULT hr = S_OK;
   if (pformatetcIn->cfFormat == CF_TEXT && pformatetcIn->tymed == TYMED_ISTREAM)
   {
      IStream *pStm;
      //Create an IStream from global memory
      HRESULT hr = CreateStreamOnHGlobal(NULL, TRUE, &pStm);
      if (FAILED(hr))
         return hr;

      //initialize CComBSTR
      CComBSTR bstrStr = "Hello World";

      //serialize string into stream
      //the length followed by actual string is serialized into stream
      hr = bstrStr.WriteToStream(pStm);

      //pass the IStream pointer back through STGMEDIUM struct
      pmedium->tymed = TYMED_ISTREAM;
      pmedium->pstm = pStm;
      pmedium->pUnkForRelease = NULL; 
   }

   return hr;
}

CComBSTR Overview |  Class Members

See Also   CComBSTR::ReadFromStream