// Only draw corner grips
procedure Tfmain.ImageEnView1DrawLayerGrip(Sender: TObject;
  ABitmap: TBitmap; layer, grip: Integer; rect: TRect);
begin
  if grip in [0,1,2,3] then
  begin
    iec := TIECanvas.Create( ABitmap.Canvas );
    IEDrawGrip( iec, rect,  ImageEnView1.GetLayersGripStyle() );
    iec.Free;
  end;
end;