RAT_OFF() Sets the mouse cursor off

 Returns
 None

 Syntax
 RAT_OFF()

 Description
 Turns the mouse cursor off

 Examples
  if rat_exist()
    rat_on()
    * do something, or wait for something...
    rat_off()
  endif

 Notes:
 There must be a rat_on() call for each rat_off() call
 in succession.

 In other words, if you do:
          rat_off()
          rat_off()

 you must then do:
          rat_on()
          rat_on()

 to turn on the mouse cursor, as it is stacked.

 e.g.

        if rat_exist()
          rat_on()
          * do something, or wait for something...
          rat_off()
        endif

 RAT_EVENT() takes care of the mouse on/off settings,
 so if you use RAT_EVENT(), you need not use RAT_ON()/RAT_OFF()

 Source: S_MOUSE.ASM