Hi!
Yes there is. But just a little warning, hiding the "x", won't do any good, the users will still be able to use CTRL+W, CTRL+F4, ALT+F4 to close.
The only "safe" way I know of, is described in mstrmage1768's faq702-1870.
Check out the Access fora, you'll find some of them in the "Related Forums" box at the right.
Roy-Vidar