Well, thank you for the suggestion, but I don't think this will work
in my application... you named too many preconditions.

I have a feeling that I am pretty close with the standard
functionality already. The application detects if the user can update
the table or not - the prepare fails if not - so all it needs is to
tell IBO to forget about that update/edit statement.
Giving visual feedback to the user (i.e. enabling/disabling controls)
is then just a simple matter.

Mirco