This is possible with onboard tools of Microsoft Windows.
The service of Active FoxPro Pages 3.0 is called 'AFP3'. This one could be stopped or re-started on a regular entry in Windows Scheduler like this:

net stop AFP3

for stopping the service and

net start AFP3

to start the service.
Just take a look at the help of 'net' for more detailed information. Don't take to much care of the different start modes like 'automtical', 'manual' or 'deactivated' - these are for interest after a reboot of the whole system. Just leave this setting to 'automatic' cause Active FoxPro Pages are not started by any kind of request to the web server but by your operating system.