title: Linepen, linebrush and stairs in Teechart
body: <p>I am trying to use linepen, linebrush and stairs but I get a red wavy line under them in Delphi 2007. I guess i forgot to add a unit.
  Which unit should I include.</p>
  
  <p>I am trying to duplicate the popupline code from the teeoffice demo.
  Thanks.
  P</p>