Help with simple restricted search

I feel a little bit embarrased asking this as I learnt my trade in database programming although that was a few years ago (c/dbase III era) now Im after a quick fix solution and then I promise to learn everything I need to for future applications.

I have a database on here that my staff use which works wonders for tracking customer orders, but I want to allow my customers to be able to access this databse to show specific information of the databse through a very simple screen.

I want them to be able to enter a order number and for it to return a screen showing a few fields which they can only read, example order number, delivery address, expected delivery date etc.

But how do I go about this if someone has a sample script that they can show me allowing me to jsut amend database names and fields to get something simple running then I would be very very grateful.

Any help would be appreciated.