NAME
        NextPubScreen -- Identify next public screen in the cycle. (V36)

    SYNOPSIS
        Buff = NextPubScreen( screen, namebuff )
        D0                    A0      A1

        ubyte *nextpubscreen( struct screen *, ubyte * );

    FUNCTION
        Returns name of next public screen in system rotation, to
        allow visitor windows to provide function to "jump" among
        public-screens in a cycle.

    INPUTS
        screen = pointer to the screen your window is currently open in,
          or NULL, if you don't have a pointer to a public screen.
        NameBuff = pointer to a buffer of MAXPUBSCREENNAME+1 characters,
          for Intuition to fill in with the name of the next public
          screen in rotation.

    RESULT
        Returns NULL if there are no public screens, otherwise a
        pointer to your NameBuff.

    NOTES
        There is no guarantee that the public screen whose name
        was returned by this function will exist or be in "public" state
        by the time you call lockpubscreen(), etc.  you must handle
        cases where lockpubscreen(), etc. will fail.

        Note that this function may return the name of a public screen
        which is open but in "private mode" (see pubscreenstatus() and
        PSNF_PRIVATE).

    BUGS
        Due to a bug, your buffer needs to be (MAXPUBSCREENNAME + 1)
        characters big, which is one more than originally documented.

        The starting screen and cycle order of the public screens isn't
        defined, so do not draw conclusions about the order you
        see in the current version of Intuition.  We reserve the
        right to add meaning to the ordering at a future time.

    SEE ALSO
        openscreen(), intuition v36 update documentation