I have an Esri based system with a class extension registered for the feature classes. This extension implements IObjectClassEvents, and handles OnChange. I get passed the modified object, but after the change was made (e.g. an object was moved from within ArcMap).

However, I also need to know the state of the IObject before the change was made. How do I go about that?

1 Answer 1


Try IFeatureChanges (for features) or more generally, IRowChanges for either a row or a feature.

  • Thanks, casting the IObject to IRowChanges gave me exactly what I was looking for.
    – Cumbayah
    Jul 28, 2010 at 14:17

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