Prevent Outlook from closing

I sometimes accidentally close Outlook. How can I configure Outlook to prompt me if I really want to close the application or have it minimized instead?Natively Outlook doesn’t have an option for this. However you can use a small utility called OLKeeper which can do this for you.

OLKeeper is created by fellow Outlook MVP Michael Bauer and is compatible with Outlook 2000, 2002 (XP), 2003 and 2007.