Yeah sure, only you need something to draw on first. For example a bitmap,
and then send that bitmap back to the browser. For example:

Bitmap _bmp = new Bitmap(250,250);
Graphics g = Graphics.FromImage(_bmp);
Pen _pen = new Pen(Brushes.Blue,10);
g.DrawLine(_pen,10,10,150,150);
_bmp.Save(Response.OutputStream, ImageFormat.Jpeg);
g.Dispose();

Only problem is that after calling the "_bmp.Save(Response.OutputStream,
ImageFormat.Jpeg);" al other controls which were on the page disappear. Mayb
someone can help me with that?

Cheers,

Gerben.