Coloring TDBGrid

procedure TForm1.ColorGrid(dbgIn: TDBGrid; qryIn: TQuery; const Rect: TRect;
DataCol: Integer; Column: TColumn;
State: TGridDrawState);
var
iValue: LongInt;
begin
if (DataCol = 0) then
begin
iValue := qryIn.FieldByName('HINWEIS_COLOR').AsInteger;
case iValue of
1: dbgIn.Canvas.Brush.Color := clGreen;
2: dbgIn.Canvas.Brush.Color := clLime;
3: dbgIn.Canvas.Brush.Color := clYellow;
4: dbgIn.Canvas.Brush.Color := clRed;
end;
dbgIn.DefaultDrawColumnCell(Rect, DataCol, Column, State);
end;
end;

procedure TForm1.DBGrid1DrawColumnCell(Sender: TObject;
const Rect: TRect; DataCol: Integer; Column: TColumn; State: TGridDrawState);
begin
ColorGrid(DBGrid1, Query1, Rect, DataCol, Column, State);
end;