Frank,
One problem (i.e. big white areas never repainted; sometimes worse) is observed if Pixel(x,y) is taken oustside of the window (canvas?) It appears it is enough to do it only once, and problems can appear much later, if program works long enough. It's only such problem I observed (Unicon 10.0)
Perhaps you could post the part that caused the problem so we can test it.
----
Kazimir Majorinc, Zagreb, Croatia
