The two events DPartDocEvents_SaveToStorageStoreNotifyEventHandler and DPartDocEvents_SaveToStorageNotifyEventHandler look almost identical in the documentation except one says it is indicating that it is safe to save to the IStream object and the other says it is safe to save to the IStorage object.  What is the difference?  I found a code sample that uses the IStream object and has to do some fancy stuff to make it work in .net.  It makes me wonder if the SaveToStorage event is outdated and I should be using the other one.  But if I am supposed to use the other one I have no idea how to use it without some code samples or some more detailed documentation.  The help files aren't helpful enough.

-Tim