How to get frames data(DOM) in html page in BHO.

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C#

BHO

I am working on internet explorer add on.I am manipulating DOM when DocumentComplete event was arises.Whole data get manipulated but when page contains frames,the data in frames get asynchronously changed through AJAX.So DocumentComplete event is not arises.I have tried on onreadystatechange event,downloadbegin event,download complete event...etc but these events are also not called when frames get refreshed.
So how can i get complete DOM when frames getting refreshed.I have tried following results.

<br />
webBrowser = (WebBrowser)site;<br />
webBrowser.NavigateComplete2 += new DWebBrowserEvents2_NavigateComplete2EventHandler(this.NavigateComplete2);<br />
webBrowser.BeforeNavigate2+=new DWebBrowserEvents2_BeforeNavigate2EventHandler(this.OnBeforeNavigate2);<br />
               webBrowser.DocumentComplete += new DWebBrowserEvents2_DocumentCompleteEventHandler(this.OnDocumentComplete);<br />
webBrowser.NewWindow2 += new DWebBrowserEvents2_NewWindow2EventHandler(this.NewWindowOpen);<br />
               webBrowser.CommandStateChange += new DWebBrowserEvents2_CommandStateChangeEventHandler(this.commandChange);<br />
               webBrowser.ProgressChange += new DWebBrowserEvents2_ProgressChangeEventHandler(this.progresschange);<br />
               webBrowser.DownloadBegin += new DWebBrowserEvents2_DownloadBeginEventHandler(webBrowser_DownloadBegin);<br />
webBrowser.DownloadComplete += new DWebBrowserEvents2_DownloadCompleteEventHandler(this.OnDownloadComplete);<code>