title: TaskbarIcon will not show balloon tip with custom icon
body: <p>I have created a WPF app which is using <a href="http://www.codeproject.com/Articles/36468/WPF-NotifyIcon?" rel="nofollow">WPF NotifyIcon.</a></p>
  
  <p>I am unable to get the ShowBalloonTip method to work with a custom Icon. I have tried like this:</p>
  
  <pre><code>_icon.ShowBalloonTip("Title", "Message", new Icon("Icons/accept.ico"));
  </code></pre>
  
  <p>Any idea how I can get a notification to work with a custom icon? (Using the built in icons works fine - i.e. using BalloonIcon).</p>