Code:

procedure TForm1.StatusBar1DrawPanel(StatusBar: TStatusBar;

Panel: TStatusPanel; const Rect: TRect);

begin

with statusbar1.Canvas do

begin

   Brush.Color := clRed;

   FillRect(Rect);

   TextOut(Rect.Left, Rect.Top, 'Панель '+IntToStr(Panel.Index));

end;

end;