>maybe it would be better to give them a warning message like "This app will shut down in 5 minutes for maintance" and let them finish what they are doing.

Yes, that is what I do. I am showing the user a counter too, that counts down from 5 minutes to zero, and after that the program closes.
About what is happening when a user is in the middle of an transaction at closedown? Maybe I can set a flag to .t. meanwhile, and let the closedownfunction wait until the flag toggels to .f.???
//Kjell