[Zope] Undo?

All, If I make changes to an object through the management interface then undo details get added to the undo list. Let's say that I delete an object. If I though delete an object through calling manage_delObjects(ids=<somelist>) then the undo info is not saved. Am I missing something, do I have to call something else, is this just not possible? tia Phil phil.harris@zope.co.uk