Question

我正在运行BHO，我正在尝试使用HTMLDocumentEvents2捕获OnClick事件然而，事件似乎永远不会到达处理程序

这就是我在做的事情：

class ATL_NO_VTABLE CBlastBhoBHO :
  public CComObjectRootEx<CComSingleThreadModel>,
  public CComCoClass<CBlastBhoBHO, &CLSID_BlastBhoBHO>,
  public IObjectWithSiteImpl<CBlastBhoBHO>,
  public IDispatchImpl<IBlastBhoBHO, &IID_IBlastBhoBHO, &LIBID_BlastBhoLib, /*wMajor     =*/ 1, /*wMinor =*/ 0>,
  public IDispEventImpl<0, CBlastBhoBHO, &DIID_HTMLDocumentEvents2, &LIBID_MSHTML, 1, 0>,
  public IDispEventImpl<1, CBlastBhoBHO, &DIID_DWebBrowserEvents2, &LIBID_SHDocVw, 1, 1>



BEGIN_SINK_MAP(CBlastBhoBHO)
SINK_ENTRY_EX(0, DIID_HTMLDocumentEvents2, DISPID_HTMLDOCUMENTEVENTS2_ONCLICK,   OnClickTrigger)
SINK_ENTRY_EX(1, DIID_DWebBrowserEvents2, DISPID_DOCUMENTCOMPLETE,      OnDocumentComplete)
END_SINK_MAP()


// Handlers
void STDMETHODCALLTYPE CBlastBhoBHO::OnDocumentComplete( IDispatch *pDisp, VARIANT *url) { // works fine }
void STDMETHODCALLTYPE CBlastBhoBHO::OnClickTrigger(IHTMLEventObj *pEvtObj) { // Never called }

// From SetSite()
  ATL::IDispEventSimpleImpl<1,CBlastBhoBHO,&DIID_DWebBrowserEvents2>::DispEventAdvise(m_spWebBrowser); 


// From OnDocumentComplete
 CComQIPtr<IHTMLDocument3> doc_;
m_spWebBrowser->get_Document((IDispatch**) &doc_);
ATL::IDispEventSimpleImpl<0,CBlastBhoBHO,&DIID_HTMLDocumentEvents2>::DispEventAdvise(doc_);

我尝试了几种变体（使用HTMLElementEvents2等）或对不同对象提供建议或者对来自SetSite的文档提供建议。我的处理程序永远不会被调用。

非常感谢任何帮助。我只需要onClick事件。

Answer 1

可能是因为LIBID_MSHTML的版本不匹配，尝试将其更改为版本4.0，即更改所有

IDispEventImpl<0, CBlastBhoBHO, &DIID_HTMLDocumentEvents2, &LIBID_MSHTML, 1, 0>

到

IDispEventImpl<0, CBlastBhoBHO, &DIID_HTMLDocumentEvents2, &LIBID_MSHTML, 4, 0>

Answer 2

尝试此功能 -

VARIANT_BOOL attachEvent( _bstr_t event, IDispatch *pdisp)

<强>例如： -

MSHTML::IHTMLDocument3Ptr pDoc3 = 0;
pDoc.QueryInterface(IID_IHTMLDocument3,&pDoc3);
IDispatchEx evtClick;

pDoc3->attachEvent(_bstr_t(L"onclick"),&evtClick);

在BHO中使用HTMLDocumentEvents2捕获OnClick事件时遇到问题

2 个答案: