An ECF is the only way to add anything to versions of Outlook prior to
Outlook 2000. An ECF can only be written using Extended MAPI. There really
is nothing in common between an ECF and a COM addin, but since Outlook 2000
and later also support ECF's to use one code base you'd have to discard the
COM addin and use the ECF for all your users.
There is information in the MSDN library on writing ECF's.
johnC said:
For our Outlook XP clients, I have written a COM Add-in which works fine.
We need the same functionality for Outlook 97 clients. How do I create an
add-in for Outlook 97 clients (non-COM?) and integrate it with corresponding
ECF?
