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copied!<p>Thanks Amnon, the following code is mostly working for me.</p> <pre><code>// an implementation of a write-only IStream. // needed because the CreateStreamOnHGlobal implementation doesn't handle // resizes well (N writes seem to take O(N^2) time) class MyStream : public CComObjectRootEx<CComSingleThreadModel>, public CComCoClass<MyStream>, public IStream { public: std::vector<char> buf; BEGIN_COM_MAP(MyStream) COM_INTERFACE_ENTRY(IStream) END_COM_MAP() STDMETHOD(Write) (const void * pv, ULONG cb, ULONG *pcbWritten); // Implement IStream abstract functions STDMETHOD(Read) (void *pv, ULONG cb, ULONG *pcbRead) { return S_OK; }; STDMETHOD(Seek) (LARGE_INTEGER dlibMove,DWORD dwOrigin,ULARGE_INTEGER *plibNewPosition) { return S_OK; }; STDMETHOD(SetSize) (ULARGE_INTEGER libNewSize) { return S_OK; }; STDMETHOD(CopyTo) (IStream *pstm,ULARGE_INTEGER cb,ULARGE_INTEGER *pcbRead,ULARGE_INTEGER *pcbWritten) { return S_OK; }; STDMETHOD(Commit) (DWORD grfCommitFlags) { return S_OK; }; STDMETHOD(Revert) () { return S_OK; }; STDMETHOD(LockRegion) (ULARGE_INTEGER libOffset,ULARGE_INTEGER cb,DWORD dwLockType) { return S_OK; }; STDMETHOD(UnlockRegion) (ULARGE_INTEGER libOffset,ULARGE_INTEGER cb,DWORD dwLockType) { return S_OK; }; STDMETHOD(Stat) (__RPC__out STATSTG *pstatstg,DWORD grfStatFlag) { return S_OK; }; STDMETHOD(Clone) (__RPC__deref_out_opt IStream **ppstm) { return S_OK; }; }; STDMETHODIMP MyStream::Write(const void * pv, ULONG cb, ULONG *pcbWritten) { buf.insert(buf.end(), (char*)pv, (char*)pv+cb); return S_OK; } // Retrieves the HTML of the current page STDMETHODIMP CPlugin::get_HTML(long lMaxSize, BSTR *pbstrHTML) { HRESULT hr = S_OK; try { CComPtr<IDispatch> pDispatch; MSHTML::IHTMLDocumentPtr pDocument = NULL; CComPtr<IStream> mystream; hr = MyStream::CreateInstance(&mystream); // streamObj will be valid as long as IStream smart pointer lives MyStream *streamObj = (MyStream*)mystream.p; hr = m_spWebBrowser->get_Document(&pDispatch); hr = pDispatch->QueryInterface(IID_IHTMLDocument, (void**)&pDocument); IPersistStreamInitPtr persistStream = pDocument; hr = CreateStreamOnHGlobal(NULL, TRUE, &stream); hr = persistStream->Save(mystream, FALSE); } catch(...) { TRACE_FN("Got exception somewhere"); } return hr; } </code></pre> <p>Now the only problem left is how to figure why some it returns me single-byte chars most times, and double-byte chars at other times. Any ideas?</p> <p>Thanks for the help.</p>

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