How can I find the last table updated?

[PatriciaW]

I have a layout which has a TO and a portal. If I wish to revert changes, I believe that I can only revert changes to the last record. If the user has started to enter data into the portal, then the changes to the main record are automatically committed. I want to put a button on the form to revert the changes, but I would like to put out a meaningful message, telling them that since they have inserted data into the portal they will not be able to revert the changes to the main record. Is there a function to determine the name of the "active TO"?

p.s. Does anyone know why it is so hard to find any help on the Get function?