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copied!<p>You can use <code>window.external</code> to call a C# method when a global function is fired in JavaScript. See <a href="http://msdn.microsoft.com/en-us/library/w290k23d.aspx" rel="nofollow noreferrer">WebBrowser Control Overview</a> for details on window.external.</p> <p>You'll need to set ObjectForScripting: <a href="https://stackoverflow.com/questions/499743/webbrowser-controls-window-external-is-always-null">Webbrowser control's window.external is ALWAYS null.</a> for this to work.</p> <p>Take @Krishna's answer to add the JavaScript (but drop jQuery because it won't be needed):</p> <pre><code>private void addScript(HtmlElement head, string scriptSource) { HtmlElement lhe_script = head.Document.CreateElement("script"); IHTMLScriptElement script = (IHTMLScriptElement)lhe_script.DomElement; script.src = scriptSource; head.AppendChild(lhe_script); } addScript(WebBrowser.Head, @"InjectMonitor.js"); </code></pre> <p>The JavaScript below (InjectMonitor.js) will find all global functions and attach your specified handler:</p> <pre><code>function augment(withFn) { var name, fn; for (name in window) { fn = window[name]; if (typeof fn === 'function') { window[name] = (function(name, fn) { var args = arguments; return function() { withFn.apply(this, args); fn.apply(this, arguments); }; })(name, fn); } } } augment(function(name, fn) { console.log("calling " + name, fn); // window.external.yourC#method }); </code></pre> <p>In this example, taken from <a href="https://stackoverflow.com/questions/5033836/adding-console-log-to-every-function-automatically">Adding Console Log to Every Function</a>, it just logs the call to console; but using window.external you could send some message back to your C# application with details of what function was called from the client.</p> <p>Finally, here's a JS Bin example (run it and don't forget the console): <a href="http://jsbin.com/uvotuc/4/edit" rel="nofollow noreferrer">JS Bin Example</a></p>

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