Graphics speed

Question

private void tegne(object sender, PaintEventArgs e) { Graphics g=e.Graphics; g.DrawLine( pen, x-1, y1, x,y2); } is there an more efficiant way to do this operation.. I'm trying to build an application for Pocket PC that can show a running curve that is constantly updating. But the problem is to get the PDA to work fast enough. So im trying to find faster ways to program the line in.