>Gregory
>
>This works fine to a certain degree. Here is an example:
>
>If the firsttime = 18:00:00
>
>and the lasttime = 18:03:45
>
>Then I would expect to see 00:03:45
>
>BUT
>
>If the firsttime = 14:00:00
>
>and the lastime = 08:00:00
>
>Then I would expect = 18:00:00 which is the time difference and not -06:00:00
>
>Can I incorporate this into my program?

Yes,

if (TimeDiff < 0 )
    TimeDiff = TimeDiff + 86400 && one day
endif

or
TimeDiff = mod(TimeDiff, 86400)