HTMLDocument3 getElementById Run-Time Check Failure #0

错误代码:

	IHTMLDocument3* pHtmlDoc3 =(IHTMLDocument3*)CHtmlView::GetHtmlDocument();
	CComBSTR id("exchange_offers");
	IHTMLElement* pDiv = NULL;
	HRESULT hr = pHtmlDoc3->getElementById(id, &pDiv);	IHTMLDocument3* pHtmlDoc3 =(IHTMLDo