title: C# How can I change the BackColor of a ToolTip with isBalloon = true?
body: <p>I saw this question: <a href="https://stackoverflow.com/questions/12990757/change-winform-tooltip-backcolor">Change winform ToolTip backcolor</a> but the top answer solution did not work...<br>
  I set <code>isBalloon = true</code>, is that the problem? How can I still change the <code>BackColor</code>?</p>