title: Show a MessageBox when the Help Button is pressed
body: <p>I am trying to show a MessageBox (or something that I can put text into) when the context Help Button in the Form's Tile Bar is pressed.</p>
  <p>This is the help button I want pressed:</p>
  <p><a href="https://i.stack.imgur.com/urgcm.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/urgcm.png" alt="Help Button" /></a></p>
  <p>Any help would be great! :)</p>