GET_INFO(WINDOW)

     For an overview of the GET_INFO built-in, see the HELP topic GET_INFO.

     TPU orders windows according to their "original top" line number.
     If multiple windows have the same top line number, the most recently
     created window comes first in TPU's list of windows.

     The following strings can be used for parameter2 when parameter1 is the
     keyword WINDOW:

       Parameter 2       | Return Value    (Parameter 1 is keyword WINDOWS)
      -------------------+------------------------------------------------+
       "current"         | Window   - Current window on the screen;
                         | 0          if none
       "first"           | Window   - First  window  in  TPU's  internal
                         |            list of windows
                         | 0          if none
       "last"            | Window   - Last window in TPU's internal list
                         |            of windows
                         | 0          if none
       "next"            | Window   - Next window in TPU's internal list
                         |            of windows
                         | 0          if pointing at last window
       "previous"        | Window   - Preceding window in TPU's internal
                         |            list of windows
                         | 0          if pointing at first window
      -------------------+------------------------------------------------+