FUNCTION SCMOD()

  Short:
  ------
  SCMOD() Maintains scroller.dbf - see scroller()

  Returns:
  --------
  nothing

  Syntax:
  -------
  SET KEY xxx to SCMOD

  Description:
  ------------
  SCMOD() is a tool for online building and modifying
  of the SCROLLER.DBF used for SCROLLER() lookup tables.

  When called by a SET KEY, it recieves the PROCEDURE
  and VARIABLE parameters from the calling PROCEDURE. It then
  determines if there exists a matching record in the SCROLLER.DBF.

  If so, the lookup definition may be modified.
  Otherwise, a new lookup definition may be created.

  Examples:
  ---------
   EXTERNAL SCMOD
   SET KEY -31 TO SCMOD  && ALT-F2

  Notes:
  -------
  Be sure to declare SCMOD external.

  SCMOD() will create SCROLLER.DBF if it doesn't exist.

  Source:
  -------
  S_SCMOD.PRG