ADXIEHTMLDocEvents under the hood

Add-in Express™ Support Service
That's what is more important than anything else

ADXIEHTMLDocEvents under the hood
 
Zhiqing Wan




Posts: 5
Joined: 2011-08-30
Hi,

could you please explain me how addin express intercepts the Click event on a particular tag (<input type="text"> for example) using ADXIEHTMLDocEvents ? Does any javascript injected into the DOM or any ActiveX object or plugin injected into the DOM?

Code example,
this.adxieHtmlDocEvents.SupportedEvents = AddinExpress.IE.ADXIEHTMLSupportedEvents.seInputText;
this.adxieHtmlDocEvents.OnClick += new AddinExpress.IE.ADXIEHTMLEventObjectEx_EventHandler(this.adxieHtmlDocEvents_OnClick);

Thanks,
Zhiqing
Posted 08 Sep, 2011 04:35:21 Top
Sergey Grischenko


Add-in Express team


Posts: 7228
Joined: 2004-07-05
Hi Zhiqing,

All is simple. I use the IConnectionPoint interface to connect to events of HTML elements.

internal bool ConnectTo(object htmlElement)
{
lock (this)
{
IntPtr lpDisp = IntPtr.Zero;
ComTypes.IConnectionPoint m_oConnectionPoint = null;

try
{
ComTypes.IConnectionPointContainer oConnPointContainer =
(ComTypes.IConnectionPointContainer)htmlElement;
oConnPointContainer.FindConnectionPoint(ref guid, out m_oConnectionPoint);
if (m_oConnectionPoint != null)
{
int m_Cookie = 0;

m_oConnectionPoint.Advise(this, out m_Cookie);
//m_oConnectionPoint.Advise(((IRemoteModule2)this.module).ModuleDisp, out m_Cookie);
if (m_Cookie > 0)
{
m_Cookies.Add(m_Cookie);
m_oConnectionPoints.Add(m_oConnectionPoint);
m_HtmlElements.Add(htmlElement);
return true;
}

Marshal.ReleaseComObject(m_oConnectionPoint);
}
}
catch
{
}
}
return false;
}
Posted 08 Sep, 2011 05:38:08 Top