TLDR:
I'd like to create a "Confirm Delete" message box when the event, delete
appointment in Microsoft Outlook 2003 Calendar is triggered. Any ideas?

In-Depth:
We have alot of people who accidently delete their appointments, or any
other agenda items in their Calendars, and we would like to offer a "confirm"
dialog box that pop-ups within Outlook to verify that they (user) wants to
delete the selected appointment, agenda item, and etc....

Any ideas, can't seem to understand if its for COM or if its an Add-in or
what not. Any pointers?