Screen Refresh

  I have a display screen that can possibly display 16 parts.  In most
cases, not all 16 slots are filled.  There is a possibility that the user
might want to add some new parts to the display.  When this happens, I call
another program which pops up a window just under the lowest line in the
display, or if the window would show up more than 2/3 of the way down the
screen, it pops up above the lowest line.  The window program is set up so
that once a part and quantity have been verified, control returns to the
calling program, which then adds the part to the display list.  At that
point I'm performing a WRITE to the display file, expecting to see that item
show up before I return to the window for another part.
  The problem is - that no redisplay occurs.  I'm still seeing the original
display screen, with a window asking for another part number.
  My question is - What do I need to do to make the new line visible before
I redisplay the part input window?  Obviously, a simple WRITE isn't doing
the job, and I don't want to do an EXFMT, because I don't want the user to
have to press another key inbetween keying part numbers.

        Duane Johnson
        Information Technology Services
        Programming Manager
        Coleman Powermate Inc.
        4970 Airport Rd.
        Kearney, NE 68847
        djohnson@powermate.com