Hi Yvan,
Yes this is possible.
Essentially, all you need to do is have a table in the backend for the sole
purpose of determining whether the programme should run or not.
On a timer event in a form that opens at startup and remains open for the
entire session of every front end running, place code similar to the
following:
IF DLookup("Checkfield","ShutdownTbl") = -1 Then
doCmd.Quit
Else
End If
Either manually enter a yes/no value into the shutdown table or do it as an
UPDATE SQL.
That is the basic method of achieving your goal, but, make it a little nicer
by giving a warning before kicking people out of course.
Regards,
Nick