>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
>
>2. Tracking their fleet of vehicles.
>
>3. Possibly integrate into QuickBooks.
>
>Can vfp handle these capabilities or will I hve to purchase a different version of vfp?


With few add-ons You will be very likely fine. However you should by all means upgrade to VFP9 ASAP.
To many good things happened from VFP6 to me missed.
Buy legal VFP9 while you still can.
It is an investment almost as good as land :) They do not make it any longer!