title: delphi How to click the arrow on the VertScrollBar
body: <pre class="lang-pascal prettyprint-override"><code>Self.VertScrollBar.Range :=  Application.MainForm.Height;
  </code></pre>
  <p>Successfully created a VertScrollBar.</p>
  <p><a href="https://i.stack.imgur.com/KUcky.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/KUcky.png" alt="image" /></a></p>
  <p>Pressing the arrow on the VertScrollBar does not respond.</p>
  <p>Is it possible to forward messages or set object options?</p>