How to receive events from more than one source in ATL?

[Sodar]

How to receive events from more than one source in ATL? For example, from DWebBrowserEvent2 and HTMLElementEvents2?

I failed to use DispEventAdvise(m_spSite) to establish a connection with the event source represented by IID_HTMLElementEvents2.


感觉翻译成中文不能达意，请各位帮忙。

[Sodar]

help!

[arxing]

class YourClass :
public DispEventImpl<1, YourClass , &DIID_DWebBrowserEvents2, &LIBID_SHDocVw, 1, 1>,
public DispEventImpl<2, YourClass , &IID_HTMLElementEvents2, &LIBID_SHDocVw, 1, 1>,
{
BEGIN_SINK_MAP(YourClass )
SINK_ENTRY_EX(1, DIID_DWebBrowserEvents2, DISPID_BEFORENAVIGATE2, BeforeNavigate2)
SINK_ENTRY_EX(2, IID_HTMLElementEvents2, DISPID_HTMLELEMENTEVENTS2_ONACTIVATE, OnActivate)
END_SINK_MAP()

STDMETHOD_(void,BeforeNavigate2)(IDispatch* pDisp, VARIANT &url, VARIANT &Flags, VARIANT &TargetFrameName, VARIANT &PostData, VARIANT &Headers, VARIANT_BOOL* &Cancel);

STDMETHOD_(void,OnActivate)(IHTMLEventObj* pEvtObj);
}

[arxing]

DispEventAdvise(m_spSite, &DIID_DWebBrowserEvents2) connect the source of DWebBrowserEvent2, and DispEventAdvise(m_spSite, &IID_HTMLElementEvents2) connect the source of HTMLElementEvents2.

[Sodar]

这段程序代码如下，请阿行帮忙看看。


//从这个函数开始跟踪进去
DispEventAdvise(m_Site, &DIID_HTMLElementEvents2);

ATLINLINE ATLAPI AtlAdvise(IUnknown *pUnkcp, IUnKnown *pUnk, const IID & iid, LPDWORD pdw)
{
　CComPtr <IConnectionPointContainer> pCPC;
　CComPtr <IConnection> pCP;

　HRESULT hRes = pUnkcp->QueryInterface(_uuidof(IConnectionPointContainer), (void **)&pCPC);
　if (SUCCEEDED(hRes))
　　hRes = pCPC->FindConnectionPoint(iid, &pCP);
//跟踪到这一句，产生以下执行结果：
//pCPC = 0x00143450
//iid = IID_HTMLElementEvent2
//hRes = -2147467262
//pCP = NULL ！！！未得到想要结果！！！
}


多谢了。
：）

[arxing]

这表明你的对象不支持source HTMLElementEvents2.

[Sodar]

啊？我。。。。我的对象是IE啊，会不支持吗？

当iid = IID_WebBrowserEvent2时一切都没问题呀。

[arxing]

IE有好多对象，但是你的Site指向的对象不一定支持。

[Sodar]

哦，是这样，那我回去看一下程序和相关的文档。
多谢阿行兄：）