Did you change the width and height properties? E.g.,
paintbox1.width := form1.width - 20;
paintbox1. height := form1.height - 20;
Or, if your paintbox sits in a scrollbox, then you might
adjust the scrollbox.width and .height to your form,
and the paintbox to your scrollbox. This should work
without any problem and is best put into the
TForm1.FormResize procedure which is called upon each
resize event. I don't know about "ClipRect" and "Region".
In general, it seems that many TCanvas-related items
have not yet been implemented: so far, I could not set
the color of a canvas (it is always grey), I could not set
the pen.mode property (which would be _very_ important
for any interactive graphics application), nor could I get
getpixel/setpixel working.
Seems like we have to patient....
NH