You received two suggestions on how you could workaround this limitation.
Charle's suggestion, which seems to be the only one you accepted, it off the
mark/incorrect and does as you say, not produce a negative time value.

--
Regards,
Tom Ogilvy



"André Lavoie" wrote in message
.. .
Excell 2000
I read your comments ad I would like to precise my needs. I tried to
format
the cell like you told me to do < -h:mm and when I type 8:00
the
result gives -8:00 but no further calculation can be made such as :

Let say -8:00 in A1 and 2:00 in cell A2 and formula A1-A2 in A3 should
give
me -10:00 as a result in A3.

Any others ideas ??

Thanks!

André Lavoie