Auto Work Order Numbers

I have a question that I don't know the answer to.
I would like to make up a generic Work Order form for an employee. Is there
anyway that everytime you make up a new for the number of the invoice will
automatically advance?

Take a look here:

http://www.mcgimpsey.com/excel/sequentialnums.html

In article <oO1ef.124028$Ph4.3807969@ursa-nb00s0.nbnet.nb.ca>,
"Paul" <paul.dns@gmail.com> wrote:

> I have a question that I don't know the answer to.
> I would like to make up a generic Work Order form for an employee. Is there
> anyway that everytime you make up a new for the number of the invoice will
> automatically advance?