Just checking in to say I tried your method and it worked great! I've set up a small circle of waypoints that follow the mouse cursor until the mouse is clicked. When it is clicked the waypoints no longer follow the mouse and are set into position (until the mouse button is let go). Each waypoint is turned on when the mouse cursor touches it. In the center of this waypoint circle is an additional sprite that when touched resets all of the waypoints to off (to ensure that the cursor is in fact being dragged in a circle). There is also a large circle surrounding all of the waypoints so if the cursor goes outside the circle shape, it resets the waypoints to off.
That way the player has to draw a circle!
It works great! Thanks a lot man! Now when the player draws a circle I can make things appear right in the middle!
Exactly what I wanted! Thanks!