How to save a variant in POWL ALV WDA?

Hi Guys,

I need to do the following and I have no idea how:

on an ALV grid, the user should be able to select from a list of various predefined layouts.

The layout are not to be created by the user but automatically.

When the user logs on I need to check if there is a layout with a specific name. If it does not exist I need to create it.

To add the pain, it is on the POWL.

How do I read if a specific user or all users have a specific layout and then create it?

thanks,

Itay