I developped a VB addin usable with Outlook and I would
like to know if theres a way to bypass this annoying
message you receive when trying to access to the 'To'
and 'From' fields of a mail message. (its a window from
outlook that prompts the user to accept or refuse to
execute the code for 1-10 mins.

We are actually using MS exchange so we can bypass the
security with some exchange policies, but I need to find a
way to do the same off-connection, on a portable computer
for example.

Any ideas?

The only solution for a non-Exchange environment is to rewrite the program. Redemption is what most people are using. See http://www.slipstick.com/outlook/esecup.htm#autosec
--
Sue Mosher, Outlook MVP
Outlook and Exchange solutions at http://www.slipstick.com
Author of
     Microsoft Outlook Programming: Jumpstart
     for Administrators, Power Users, and Developers
     http://www.slipstick.com/books/jumpstart.htm