Well Matt, thanks for the whole reply ...

The only thing that I've explained bad it's that when I'm saying "whole
funtionality", it doesn't include the functions.
I can't call them anyway ( only marking the class in the
add-ins-automation ). When they're visible I can call them.

I'll take a look to the links and I'll tell you my progress ( if any
;-) ).

Thanks again for your help.
Julio