How to right-click interaction with inventory items?

I am trying to get right-click interaction working with items in inventory.

1. Is it possible to imitate using items like in DAYZ with only scripting, without using custom addons?

2. I was thinking to attach some dialog to inventory items but I dont know what handle is used for calling stuff on right clicking.

If someone could point me in the right direction that would be nice.

My understanding is you need a mod for this to be possible. The standard BI gear window does not support dynamic text. Although they have patched in the ammo count bar in the gear window, so maybe it could be possible using similar techniques?