Get username of who owns the record lock

[hniessen]

I am working on a database application which exists out of a back-end and front-end part. The data in the back-end database will thus be edited by different users. Now I want to add following feature:

When someone wants to edit certain data, but someone else is already editing this data. I want a msgbox popping up with the name of the person who already is editing the data.

Can someone help me with this

Greetings,
Hans