Difficulty in understanding c# method description
<p>I was looking at <a href="http://msdn.microsoft.com/en-us/library/system.windows.forms.control.begininvoke.aspx" rel="nofollow"><code>Control.BeginInvoke</code></a> method and I didn't quite get what it means when it says:</p>

<blockquote>
  <p>Executes a delegate asynchronously on the thread that the control's
  underlying handle was created on.</p>
</blockquote>

<p>What is <code>control's underlying handle</code>? What does it do?</p>
