Thank you very much. It is working fine.

>You do all your treatment inside the program called by the ON SHUTDOWN. If it's OK to close the application, issue a QUIT in your program. Otherwise, just return from the program and the application won't shut down.
>
>HTH
>
>>Yes but how can you prevent it from closing. I.E ask if the user want to save data and if he wants, not shut down the main window??