Internet Explorer 编程简述（十一）完美的Inplace Drag & Drop——“超级拖放”

}

 

void CHtmlDocument2::AllowDisplayDragCursor(CComQIPtr<IHTMLEventObj> pEventObj, BOOL bAllow)

{

VARIANT v;

v.vt = VT_BOOL;

 

v.boolVal = !bAllow ? VARIANT_FALSE : VARIANT_TRUE;

pEventObj->put_returnValue(v);

}

 

void CHtmlDocument2::OnDrop(void)

{

CComQIPtr<IHTMLWindow2>

pWindow;

CComQIPtr<IHTMLEventObj>

pEventObj;

CComQIPtr<IHTMLEventObj2>

pEventObj2;

CComQIPtr<IHTMLElement>

pElement;

CComQIPtr<IHTMLDataTransfer>   pdt; //此处演示如何使用IHTMLDataTransfer

 

HRESULT hr = m_spHtmlObj->get_parentWindow( &pWindow );

hr = pWindow->get_event( &pEventObj );

hr = pEventObj->QueryInterface(IID_IHTMLEventObj2, (void **) &pEventObj2 );

hr = pEventObj2->get_dataTransfer(&pdt);

 

CComBSTR bstrFormat = "URL"; //首先尝试获取URL