This control implements an area that can be drawn by the application. It has two behaviors, standard and cached, defined by the Cached property.

• In `standard mode', The DrawingArea will raise the Draw event each time it needs to be refreshed.
• In `cached mode', The drawing is done once, by using the DrawingArea control as a drawing device. This drawing is stored inside an internal Picture that is used by the DrawingArea to refresh itself.

By default, the drawing must be done by using the Draw class. If you set the Painted property, the drawing will have to be done by the Paint class, and so will be anti-aliased.