RAT_COLR() Returns mouse column at the last right button
 press

 Returns
 <nColumn> => mouse column at last right button press

 Syntax
 RAT_COLR()

 Description
 Returns mouse column at the last right button press

 (as recorded by a call to rat_rightb() )

 Examples
  if rat_rightb()

    ?"While you were out:"

    ?"Right button was depressed at"

    ??rat_rowr(),rat_colr()

  endif

 Notes:
 This is different from RAT_COL() in that RAT_COL()
 tells the mouse row NOW whereas RAT_COLR() tells where the mouse
 was at the last recorded right button press (as recorded by a
 call to rat_rightb() )

 Source: S_MOUSE.ASM