I'm trying to simplify custom/configuration properties in batches of files (years of neglect have some files with over 200 custom properties, the bulk of which are irrelevant).  

I get a good start with 

. https://help.solidworks.com/2021/english/api/sldworksapi/list_custom_properties_example_vb.htm

 

 

However, that doesn't seem to include all the versions.  When I run it, I see the lists for configuration-specfic properties, but not the custom ones.  How can I read both types?