.. meta::
   :description: ActiveX控件访问所在网页的DHTML文档对象模型(MFC）#

ActiveX控件访问所在网页的DHTML文档对象模型(MFC）
=================================================

.. post:: 23, Oct, 2003
   :tags: MSHTML, ActiveX, MFC
   :category: UI
   :author: me
   :nocomments:


.. code-block:: C++

    void CICWXPlayerCtrl::SetHolderID(CICWXPlayerWindowHolder::enumHolderIndex iHolderIndex,LPCTSTR lpszElementID)
    {
        IOleClientSite* pClientSite=GetClientSite(); 
        do{
            if(pClientSite==NULL)
                break;
            CComQIPtr<IServiceProvider> pISP(pClientSite);
            if(pISP==NULL)
                break;
            CComPtr<IWebBrowser2> pIWebBrowser2;
            pISP->QueryService(IID_IWebBrowserApp, IID_IWebBrowser2,
                (void **)&pIWebBrowser2;);
            if(pIWebBrowser2==NULL)
                break;
            CComPtr<IDispatch>    spDocument;
            pIWebBrowser2->get_Document(&spDocument;);
            CComQIPtr<IHTMLDocument2> pIHTMLDocument2(spDocument);
            if(pIHTMLDocument2==NULL)
                break;
            CComPtr<IHTMLElementCollection> pHTMLElementCollection;
            pIHTMLDocument2->get_all(&pHTMLElementCollection;);
            if(pHTMLElementCollection==NULL)
                break;
            COleVariant varName(lpszElementID,VT_BSTR);
            COleVariant varindex;
            CComPtr<IDispatch>    spElement;
            pHTMLElementCollection->item(varName,varindex,&spElement;);
            if(spElement==NULL)break;
            //is it an Iframe?
            CComQIPtr<IWebBrowser2> pFrame(spElement);
            if(pFrame){
                switch(iHolderIndex){
                    case CICWXPlayerWindowHolder::WebHolder:
                    case CICWXPlayerWindowHolder::TextHolder:
                    m_holders[iHolderIndex].SetTarget(spElement);
                    break;
                }
            }
            CComQIPtr<IHTMLObjectElement> pObjectElement(spElement);
            if(pObjectElement==NULL)
                break;
            CComPtr<IDispatch>    spObject;
            pObjectElement->get_object(&spObject;);  
            m_holders[iHolderIndex].SetTarget(spObject);
        }
        while(FALSE);
    }