Search Function VBA

Hello,
I have a worksheet that has customer information that I would like to add a search button to find information based on key words. Columns "E" through "T" are my customers information such as customer name, address, phone, alt phone, etc and I have 2000 entries. I was looking to create a User Form that searches keywords and displays them in a listbox. For example, if a customer calls and wants to update information I would like to search he customer name and then be able to view their info. Or if I am going to add a new customer to my list I would like to search if they already exist before I add a duplicate.

Hi.
The link referred to by 'sintek' includes one of my contributions.
It contains a minor bug, simply delete the line highlighted by the de-bugger (the sheet referred to does not exist)it will then run.
Attached another similar approach based upon similar lines, it auto-generates unique id and checks existence of new entrant.
Start by clearing the form, the rest should be intuitive.
torachan.