HTMLAnchorEvents_Event_onclick失效?

I am using the csEXwb control with Visual Basic 2005 .NET to trace user actions in the IE. I have a problem that I don't get any click events from  the links on the page I am browsing. The first thing, I have done, was to define event handlers for click events after the document have been loaded. So I load a DOM after the document is completely loaded (e.istoplevel = true) and declare handlers to trace onclick events for HTML elements with the node name "A":

我现在在Visual Basic .NET 2005下用csEXwb控件，来追查在IE浏览器的用户操作。我有一个问题，我没有得到我浏览的页面上的链接的任何点击事件。在程序文档已经被加载后，我所做的第一件事，是为click事件定义​​事件处理。该文件是完全加载（e.istoplevel = TRUE）后，我打开一个DOM，并定义处理程序来跟踪HTML元素“A”的onclick事件。

Dim anchor As HTMLAnchorElementClass = _ CType(node, HTMLAnchorElementClass)
AddHandler anchor.HTMLAnchorEvents_Event_onclick, AddressOf HandleClick.

I expect to get call in the HandleCheck function each time I click on any link on the page, but I don't get any call at all. 

我期望得到的HandleCheck功能，每次我点击页面上的任何链接调用，但我没有得到任何调用。

I have heard there are some complications when tracing events from COM objects in the VB code. What could be here wrong? I have been trying the same with the other event HTMLAnchorEvents2_Event_onclick, but get the same behaviour - no events fired.

我听说那里的VB代码跟踪从COM对象的事件时，有一定的并发症。在这里有什么错了吗？我一直在试图同与其他事件HTMLAnchorEvents2_Event的onclick，但得到了同样的行为 - 没有任何事件触发。

Here is an easier way to handle click events for A elements. Subscribe to document's OnClick event, catch OnClick event in your handler, examine the IHTMLEventObj.SrcElement ,which is an IHTMLElement.

这里有一个简单的方法来处理click事件对于A元素。订阅文档的OnClick事件，在您的处理程序赶上OnClick事件，检查IHTMLEventObj.SrcElement，这是一个IHTMLElement。

If  IHTMLEventObj.SrcElement != null and  
IHTMLEventObj.SrcElement.tagName == "A" and  
IHTMLEventObj.SrcElement.getAttribute("name", 0) == "Desired name" and  
IHTMLEventObj.SrcElement.getAttribute("id", 0) == "Desired id"  
Then   
perform desired tasks.  

Please refer to frmHTMLEditor.cs to see an example of how to subscribe to document events (frmHTMLeditor_Load event) and how to handle such events (IHTMLEventCallBack.HandleHTMLEvent event).

请参考frmHTMLEditor.cs看如何订阅文档事件为例（frmHTMLeditor_Load事件），以及如何处理此类事件（IHTMLEventCallBack.HandleHTMLEvent事件）。

Don't get any HTML events to be called back. Is it possible that VB.NET have some restrictions on using this callback technique?

这些我都做了，但还是没有得到任何HTML事件被召回。有没有可能是VB.NET对使用这种回调技术的一些限制？

I habe made the following steps:

我HABE作了如下步骤：

1. Declared the form implements the interface IfacesEnumsStructsClasses.IHTMLEventCallBack

2. Declared event handlers for DocumentComplete and BeforeNavigate2 events in the Form_Load

3. Set HTML events to call back in the Form_Load

Dim dispids() As Integer = { _
IfacesEnumsStructsClasses.HTMLEventDispIds.ID_ONKEYUP, _
IfacesEnumsStructsClasses.HTMLEventDispIds.ID_ONCLICK, _
IfacesEnumsStructsClasses.HTMLEventDispIds.ID_ONCONTEXTMENU}
m_elemEvents.InitHTMLEvents( _
Me, _
dispids, _
IfacesEnumsStructsClasses.Iid_Clsids.DIID_HTMLElementEvents2)
cEXWB1.NavToBlank()

4. Connected to HTML events in the DocumentComplete Dim webBrowser As IfacesEnumsStructsClasses.IWebBrowser2 = _CType(e.browser, IfacesEnumsStructsClasses.IWebBrowser2),Dim pBody As IHTMLDocument3 = webBrowser.Document m_elemEvents.ConnectToHtmlEvents(pBody.documentElement)

5. Disconnected from HTML events in the BeforeNavigate2 m_elemEvents.DisconnectHtmlEvents()

6. Implemented HandleHTMLEvent handler as simple as MsgBox("I am here") return True

I have meantime tested the same procedure (steps 1 .. 6) in C# and it seems to work accurate.

我曾同时测试了同样的过程（步骤1。6）在C＃中，它似乎工作准确。

I have found the error.  The reason was an ambiguous definition of the function,which implements HandleHTMLEvent handler in my code.

我发现了错误。原因是所述函数的模糊定义，在我的代码里，实现了HandleHTMLEvent 事件处理。