Disable 'click' sound when accesing WebBrower control

To me the second method was problematic. After searching, I found an apparently equally good solution:

webBrowser1.DocumentText = text;

or in your case:

webBrowser1.Document.Write("<h1>Hello, world!</h1>");

from here: http://www.windowsdevelop.com/windows-forms-general/webbrowser-stealing-focus-56881.shtml[^].