Thanks for the tip.

For information (from my initial testing):-

For embedded objects, getfldstate() changes immediately when the object is saved / updated / closed.

For linked objects, getFldState() changes only when moving off of the object on the form (i.e. losing focus):-
when the object has not been edited
or
when the object has been edited
or
when the object is closed and then the focus is lost.
(in other words, just about all the time!)

It remains at 1 if the object is saved (in its own application) the table is updated and the object is edited again (in its own application).

This is going to be fun, I can tell!