BLIDEMMIN
------------------------------------------------------------------------------

  Function : Get / Set demonstration minutes

  Syntax   : nuValue = BLIDEMMIN([nuLimit])

  Return   : Demonstration minutes limit

  This function returns the demonstration time limit of the program if it
  was set at link time, and returns an integer number of minutes between 0
  (not set) and 65535.

  It may also be used to extend the limit to allow the current task to
  finish by passing the new limit as a parameter to the function. Since
  this is the new limit it will always be greater than the value returned.

  Example  :
  *  Get the time limit and extend it by 2 minutes
  *
  TMPDEMMIN = BLIDEMMIN()    && Get the time limit
  IF TMPDEMMIN > 0
      ?"The time limit is", TMPDEMMIN, "minutes"
      ?"It will be extended by 2 minutes"
      BLIDEMCAL(TMPDEMMIN + 2)
  ENDIF