How to define a sequence in VBCS Business Object

Summary

How to define a sequence in VBCS Business Object

Content

We have a requirement to display a number on screen that has to be unique for each transaction we make on screen. Basically something similar to a Sequence in Database table. Need guidance on how to do that when we have the data stored in VBCS business object. We have the work around to fetch the value an update if after each transaction but this is not a good solution for us as their will be multiple users using the screen simultaneously so the next sequence should automatically updated once we have used the current one.