{Getbkcol.PAS}
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 {Sample code for the GetBkColor function.}

  uses Crt, Graph;

 var
   Gd, Gm: Integer;
   Color: Word;
   Pal: PaletteType;
 begin
   Gd := Detect;
   InitGraph(Gd, Gm, '');
   if GraphResult <> grOk then
     Halt(1);
   Randomize;
   GetPalette(Pal);
   if Pal.Size <> 1 then
   begin
     repeat   { Cycle through colors }
       Color := Succ(GetBkColor);
       if Color > Pal.Size-1 then
         Color := 0;
       SetBkColor(Color);
       LineTo(Random(GetMaxX), Random(GetMaxY));
     until KeyPressed;
   end
   else
     Line(0, 0, GetMaxX, GetMaxY);
   Readln;
   CloseGraph;
 end.