BLIDEMMIN()                   Get / Set demonstration minutes
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 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"
       BLIDEMMIN(TMPDEMMIN + 2)
    ENDIF