title: How do I paint the background of TStringGrid
body: <p>I do custom drawing of a Delphi TStringGrid using the OnDrawCell event.
  There is no problem with the area covered by cells, but how do I paint the background right of the rightmost column and below the last row ?</p>
  
  <p>(Edit)
  Painting is not really necessary, I just want to set the color used for background.
  I am using XE2 and investigating VCL styles.
  Even in default drawing, setting Colors in a stringgrid, seams to have no effect at all.</p>
  
  <p>TIA</p>