Hi Karen & Others,
I was wondering if you ever got this to work. I'm looking for the same property.
Hopefully its possible to read the 9slice coordinates that are set within a symbol; if so; how?
Sadly, there doesn't appear to be any way to get the positions of the 9-slice guides in a symbol. There are two functions for SETTING the guides, but nothing for GETTING them. An incredibly aggravating hole in the API.