title: Close a balloon tip programmatically
body: <p>Is there a way to close balloon tip programmatically, so that the user does not have to click on it?
  <br>Lets imagine that the situation changes and there is no reason to show that tip anymore, showing it longer until the timeout expires would just be noise...</p>
  
  <p>I tried </p>
  
  <pre><code>icon.BalloonTipText = "";
  icon.BalloonTipTitle = "";
  icon.ShowBalloonTip(0);
  </code></pre>
  
  <p>but that resulted in <strong>ArgumentException</strong> "Balloon tip text must have a non-empty value".</p>
  
  <p>I would prefer a C# answer, but C++ does too.</p>