My objective is to be able to display a custom icon against a mail message
ideally based on the value of a custom field added to the message. I know
that I can show custom icons using the sub-classing technique, however, in
my particular project, I really need to retain the original message and
just display a different icon depending on the value of a field which I

The C3PO development is in C++

thanks in advance, Nigel