I'm trying to prevent a user from opening a Foxpro 5.0 application more than one time. Right now I'm loging a flag to a Foxpro table and resetting it when they log out of the application. Problem is when there is a power outage or the pc has to be rebooted without properly exiting the application, the flag has to be reset manually by the user.

Is there another way to prevent multilple instances of an application from being opened?