How to access linked symbol sub elements

How to access linked symbol sub elements

Hi to all,
I'm searching for a way to dynamically access sub elements of a linked symbol instance inside a picture.
In particular I need to search for the Function dynproperty inside a particular subitem of a linked symbol.
I'm able to know the LinkedName, SubstituteDestination, SubstituteSource, but not a way to go inside the Linked Symbol.
All of this inside a custom ZenOn wizard.

This is a migrated post! Originally posted on 21.09.2012 by user carlo.chiari. Please be aware that information can be outdated.