Which will fail if tested on my now air-gapped not internet connected tiny 2 physical machine network I have warming up the place additionally ;-)
So I will argue for belt, suspenders, chastity belt, pepper spray and carrying saw and lockpicks myself...

>Here I'm pro internet time - getting time per transaction. By a set of IPs provided with the prog. Do not trust system or LAN or DNS.
>
>>In addition to Christians hint, it might be better to add 2 timestamp colums to each CUD statement: timestamp as is set in MySQL and datetime() as set in vfp on client machine. Client time could be altered after program start ;-))
>>
>>
>>>>Just create a file on the server, and check its datetime with Adir().
>>>
>>>This is a good idea, but I also have a problem.
>>>The folder in the server must be R/W in order to be able to write.
>>>
>>>While I'm using VFP9 with MySQL database, no need to share the server's folder.
>>>The server's folder remains ReadOnly
>>>
>>>Jerry Yang
>>>
>>>
>>>
>>>
>>>>>in the LAN environment, is there a way to know the server's datetime()?
>>>>>
>>>>>My client has an issue, the operator changes the clock so he can enter old invoices.
>>>>>My client want to each time the cashiers login, the program will compare the datetime() with the server's datetime()
>>>>>
>>>>>Thanks for the help
>>>>>
>>>>>Regards,
>>>>>
>>>>>Jerry Yang
>>>>
>>>>Just create a file on the server, and check its datetime with Adir().