SetOverlay
	SetOverlay Sets the overlay used by the JAM object. bSuccess = myJAM.SetOverlay( Overlay_Object ) Return value TRUE if the overlay was set successfully, otherwise FALSE. Parameters Overlay_Object A pre-created overlay to use. Comments The overlay object can draw over the main game surface to create effects such as fog-of-war, or night-vision. Only one overlay can be in use at a time. See also JAM:GetOverlay JAM © 2005 no one in partiular Project started by David Evans in 2005