"Michael" <Michael@discussions.microsoft.com> wrote in message
news:8AC75587-1F31-433E-835F-C6CF16D01F93@microsoft.com...
> Hi!
> I'm currently working on an editor form my 2D game engine which uses
> polygons for collions detection. From the main form the user chose to
> create
> a collision polygon and then an other form is show. This form is derived
> from
> System.Windows.Forms.Form. Each time the user presses a mouse button a
> point
> i is added to an ArrayList. The forms OnPaint method calls
> Graphics.DrawPolygon() to draw the collision polygon (the graphics comes
> from
> the PaintEventArges passed to the OnPaint handler). When a point is added
> I
> want to repaint the entire form. I've tried using Refresh() and
> Invalidate()
> but my application keeps throwing an exception. Any ideas why?
>
> /Michael