>I have VFP Version 6.0. I have a potential client that wants a database application that allows:
>
>1. Dispatch via texting to their drivers

You can do this with VFP - but you'll need a 3rd party tool (like an activex) to send SMS messages to phones.

>2. Tracking their fleet of vehicles.

Again this is possible with VFP. How involved this becomes depends on what it is you want to track and when. Do you want live-GPS tracking, or do you just want to know things like the total miles driven?
If you're trying to solve the infamous "traveling salesman" problem - http://en.wikipedia.org/wiki/Travelling_salesman_problem ..then that is another thing that can be very VERY tricky to do. If this is what you're trying to accomplish let me know as I know of some VFP code that does this (although I'm sure the guy will want some $ for it)

>3. Possibly integrate into QuickBooks.

Might check here
http://fox.wikis.com/wc.dll?Wiki~QuickBooks:
http://qodbc.com/
...there is also a white-paper on this located here: http://www.ita-software.com/foxpage.aspx


>Can vfp handle these capabilities or will I hve to purchase a different version of vfp?

There isn't going to be much of a difference to do these things between VFP6 and VFP9 - but you might want to consider upgrading to VFP 9 anyway.