case DISPID_DOCUMENTCOMPLETE:

        {

#pragma region 获取页面总高度

            HRESULT hr;

            IDispatch *pdisp;

            hr = m_pWebBrowser2->get_Document(&pdisp);

            if(pdisp == NULL) break; //if NULL, we failed 

            // 获得Html文档指针

            IHTMLDocument2 *pDocument = NULL;

            hr = pdisp->QueryInterface(IID_IHTMLDocument2, (void**)&pDocument);

            if (pDocument == NULL) break;

            IHTMLElement *pBody = NULL;

            hr = pDocument->get_body(&pBody);

            if (pBody == NULL) break;

            IHTMLTextContainer *pCont = NULL;

            pBody->QueryInterface(IID_IHTMLTextContainer, (LPVOID*)(&pCont));

            if(pCont == NULL) break;

            // 获得页面总高度

            long scroll_height = -;

            if (FAILED(pCont->get_scrollHeight(&scroll_height)))

                break;

            pBody->Release();

            pCont->Release();

            pDocument->Release();

            pdisp->Release();

            if (scroll_height != -)

                m_dwHtmlHeight = scroll_height;

            if (NULL != m_pManager)

                m_pManager->SendNotify(this, _T("document_complete"), scroll_height);

#pragma endregion

　　　　}