GDI+库

uses Winapi.GDIPAPI, Winapi.GDIPOBJ{, Winapi.GDIPUTIL};

procedure TForm1.FormPaint(Sender: TObject);
var
graphics: TGPGraphics;
pen: TGPPen;
begin
graphics := TGPGraphics.Create(Canvas.Handle);
pen := TGPPen.Create(MakeColor(255,0,0));
graphics.DrawRectangle(pen, MakeRect(11, 22, 33, 44));
pen.Free;
graphics.Free;
end;