title: How to create collapsible panels as custom controls in Winforms?
body: <p>The closest I can think of using is the GroupBox control which has a custom drawing at the top identifying the panel.</p>
  
  <p>Is it doable? I have done independent custom controls like buttons, sliders, color pickers, but not totally sure if this sort of drawing can be done on a GroupBox?</p>
  
  <p>I would need the grouping of a GroupBox or a TabPanel.</p>
  
  <p>Are there any alternatives on the net that I can use?</p>
  
  <p>Just exploring the alternatives before I start doing it.</p>