>This is really simple I'm sure, but when a user clicks on the X in the window to close my application, I get the message "Cannot Quit VFP". How do I resolve that?

You have to write a little procedure which will do the closing, and issue somewhere on application start:

ON SHUTDOWN DO myshutdown.prg

You may check Help for ON SHUTDOWN command.

>
>I also have one user who gets the following error message when starting my VFP Exe: "This program has performed an illegal operation and will be shut down." Our PC environment is all Dell systems that are supposed to be configured indentically, but this user receives these messages on a daily basis.
>
>Thanks for your input


This is just another name for old GPF. Can be caused by numerous reasonsand it is very diffucult to say what is wrong. It may have nothing to do with VFP. Try to see if there is any difference in configuration, and also make sure that all appropriate Service Packs are installed.