Send additional information to the logic hook

I was familiar with Sugar 6.5. Now I'm learning how to work with recent versions but is hard to change the mindset.

I'm working in a custom module. I've created a custom button to duplicate a record and create a new version of the record.
I've extend record view and I'm able to create the duplicate record using the layout:create

I need to send some extra information for the logic hook before_save so I can diferenciate from a create record and a new version create record.

How can I send additional information to the logic hook?
For example send a control variable like subaction=newVersion

Is it possible for someone to direct me towards a path?