Screen Management System Subroutines V1.1
                   Screen Management System Subroutines V1.1


          Several changes have been made to the system since the  Fall
          '85  DECUS  Symposium.   The  more important ones are listed
          below.

             CHANGES.
             ________
             ________
          1  CHANGES.


             1.  The system common area,  SMG.DFN,  has  been  changed
                 from  a  COMMON to a MAP.  The fields which were used
                 to store the number of  rows  and  columns  for  each
                 virtual display have been eliminated.

             2.  The maximum number of virtual displays is now  twenty
                 (20).  The previous maximum amount was ten (10).

             3.  The valid  values  for  the  Echo_flag  parameter  in
                 SMG_ONE_CHAR
                 SMG_ONE_CHAR  are  now 0 (do not echo) and -1 (echo).
                 The former values were 0 and 1.

             4.  The  Echo_flag  parameter  has  been   removed   from
                 SMG_ONE_CHAR_CLR
                 SMG_ONE_CHAR_CLR.   Programs using this routine will,
                 of course,  have  to  be  modified  to  reflect  this
                 change.

             5.  The system  object  library,  SMGLIB.OLB,  no  longer
                 contains  the SMGDEF.MAR definition symbols.  DEC was
                 nice enough to place them in STARLET.OLB with version
                 4.4 of VMS.

             6.  The  default  response   will   be   redisplayed   in
                 SMG_DEF_INPUT
                 SMG_DEF_INPUT  if  the  cursor  is  backed  up to the
                 beginning of the field (by striking the delete key).

             7.  The    third     and     fourth     parameters     of
                 SMG_CHANGE_VIRTUAL_DISPLAY
                 SMG_CHANGE_VIRTUAL_DISPLAY   have   been  changed  to
                 longwords.


             NEW ROUTINES.
             ___ _________
             ___ _________
          2  NEW ROUTINES.


                 SMG_CURSOR_ON_OFF.
             1.  SMG_CURSOR_ON_OFF.  Turns the  cursor  on/off.   This
                 works on VT200 series terminals only.

                 SMG_GET_DISPLAY_ATTR.
             2.  SMG_GET_DISPLAY_ATTR.  Returns   attributes   of    a
                 specified virtual display.

                 SMG_GET_PASTING_INFO.
             3.  SMG_GET_PASTING_INFO.  Returns  pasting   information
                 about a specified virtual display.







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