title: Make visible baloonTipText until it is clicked
body: <p>I have a <code>NotifyIcon</code> in my program which displays a baloon tip in the taskbar. I wrote code as</p>
  
  <pre><code>notifyIcon1.Icon = new Icon(SystemIcons.Application, 40, 40);
  notifyIcon1.Visible = true;
  notifyIcon1.Text = "Test Notify Icon Demo";
  notifyIcon1.BalloonTipText =count+ " Alerts";
  notifyIcon1.BalloonTipIcon = ToolTipIcon.Info;
  notifyIcon1.BalloonTipTitle = "Alert!";
  notifyIcon1.ShowBalloonTip(999999999);
  </code></pre>
  
  <p>The baloon tip is invisible after the set time (999999999). But I want to show the baloon tip until it is clicked as I have <code>baloontipclicked</code> event.</p>
  
  <p>How to make baloontip visible forever?         </p>