Coding- Attribute Modified\Add date

I am trying to list all the attributes that were modified\added within a time interval. I am using the Object History table but getting more attributes than what was changed during the specified date. 

In there an API that can get me the attribute modified\added date?  or what fields I need to interrogate to get the desired information from ERSTudio system tables?

ERSTudio Support used to answer these questions before but now they stop doing so.

Thank you in advance