If you are programming for the Apple IIGS, and want to write a demo program
that moves the mouse automatically across the screen, you have probably
discovered that when you can use the POSMOUSE command to move the cursor
position, but that when it moves to the new position it disappears. The
only way to get the cursor to reappear is to move the mouse.
Rather than using PosMouse, you should use FakeMouse as described on
pages 7-34 of the Apple IIGS ToolBox Reference Manual, Volume 1
(ISBN #0-201-17746-3).