>In my application, when the users changes values in the system preference and saves it, I release relevent forms and reload them.
>
>The problem is that if the user click on the X at the upper right corner of the main application window, he/she gets a message window titled " Microsoft Visual Foxpro" and the message says "Cannot Quit Visual Foxpro".
>
>Does anybody know what would cause the message to be issued?
>
>TIA

You need to add an

ON SHUTDOWN DO MyFunction()

to your main.prg