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    <p>The code in your referenced article is not C#, it is Javascript. I believe the idea would be to inject the JS into your HTML page so that it can run when the page unloads, which will clean out the existing JS events.</p> <p>You can check out this article for adding JS to a page in your WebBrowser control:<br> <a href="http://www.codeproject.com/Articles/94777/Adding-a-Javascript-Block-Into-a-Form-Hosted-by-We" rel="nofollow">http://www.codeproject.com/Articles/94777/Adding-a-Javascript-Block-Into-a-Form-Hosted-by-We</a></p> <pre><code>Dim scriptText As String = &lt;string&gt; function ReleaseHandler() { var EvtMgr = (function() { var listenerMap = {}; // Public interface return { addListener: function(evtName, node, handler) { node["on" + evtName] = handler; var eventList = listenerMap[evtName]; if (!eventList) { eventList = listenerMap[evtName] = []; } eventList.push(node); }, removeAllListeners: function() { for (var evtName in listenerMap) { var nodeList = listenerMap[evtName]; for (var i = 0, node; node = nodeList[i]; i++) { node["on" + evtName] = null; } } } } })(); } function purge(d){ var a = d.attributes, i, l, n; if (a) { for (i = a.length - 1; i &gt;= 0 ; i -= 1) { n = a[i].name; if (typeof d[n] === 'function') { d[n] = null; } } } a = d.childNodes; if (a) { l = a.length; for (i = 0; i &lt; l; i += 1) { purge(d.childNodes[i]); } } } &lt;string&gt; Dim head As HtmlElement = webBrowser1.Document.GetElementsByTagName("head")(0) Dim script As HtmlElement = webBrowser1.Document.CreateElement("script") Dim domElement As IHTMLScriptElement = CType(script.DomElement, IHTMLScriptElement) domElement.text = scriptText head.AppendChild(script) </code></pre> <p>I've not tested this code (I'm not really sure how I'd go about doing that since you've offered no example code yourself)... this is more of a suggestion for how you might proceed. I've never tried to insert JS into a WebBrowser control, so I'm not quite sure how you'd go about executing it (since, in theory, the JS will have already executed after loading the page, thus your injected JS would be "late to the party").</p> <p>You'll also need to find a way to wire-up the document so that it calls both of these functions when it unloads. The idea is to eliminate JS memory leaks by eliminating JS objects and events, so simply having the functions declared is insufficient. I've seen a lot of articles online discussing how the OnBeforeUnload event is broken in the WebBrowser control (it doesn't fire correctly), so you may have quite a bit of work cut out for you.</p>
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    1. COi did find a way to invoke the script... it worked for simple scripts such as popping up a message box... but it didnt work for the issue in question. Ex: `wb.Document.InvokeScript("ReleaseHandler")` `Dim args As Object() = {"document.body"}` `wb.Document.InvokeScript("purge", args)`
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    2. COI think you'd need to invoke a script that attaches the javascript functions to a page unload event. If I've understood the solutions correctly. I get the impression, however, that the WebBrowser control wasn't designed for this kind of use case. You may be better off exploring alternative technologies. You might also want to consider the [legal ramifications](http://en.wikipedia.org/wiki/Web_scraping#Legal_issues) of what you are doing (if you haven't already).
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