title: ToolStrip control never fire Enter/Leave event?
body: <p>I created a movable panel in WinForms. I use a ToolStrip as a titlebar in the panel. I'll use the ToolStrip to move the panel as well as indicating the panel is "active" or not. So when the panel is active, I want to change the ToolStrip's BackColor to Red.</p>
  
  <p>UPDATE: The panel will host other controls, such as a listview. I want the panel being shown as "active" when the hosted control get focus, kind like the behavior of a normal window, whereas the window becomes the panel, and the titlebar becomes the ToolStrip.</p>
  
  <p>When the panel is considered as "active"</p>
  
  <ol>
  <li>hosted control get focus</li>
  <li>ToolStrip being MouseDown/MouseClick</li>
  <li>ToolStrip being dragged by mouse</li>
  </ol>
  
  <p>The idea is capturing ToolStrip's Enter/Leave event to change the color, but it seems those events are never fired.</p>
  
  <p>Are those events truly never fired? Should I capture other events?</p>