Notes/Domino 4 and 5 Forum

I am creating an agent that builds a Daily report that lists Design Elements (like Agents, Forms, Subforms, etc) for one Database. Along with the names of the elements I want to include the Last Modification Date. Similar to the Design Synopsis. But I can't get the Last Modified date for agents or forms. I've used Agent.DateModified and Agent.LastModified, but they don't work. Is there a property of Last modified for elements?