Hi,
I believe you have already asked this question in private message and we have already answered. Here is our original answer:
This is more complicated. You will need to do it with JavaScript. Then use WebView.JSInitCode to inject the script code into the page, or use WebView.EvalScript to run the code directly. In either case, the goal is to have your JavaScript code called when the button is clicked. Once you have your code called in JavaScript, you can then callback into your .NET code through JavaScript extension:
https://www.essentialobjects.com/doc/webbrowser/advanced/jsext.aspxIf you have any questions about this answer, please feel free to reply with your question. You should NOT just ignore our answers and choose to ask the same question again. You will not get a different answer.
Thanks!