Hello,
You may try this approach, have a text data type, I assume you using VB as
a front end. Before storing it into access you encrypt the password and store
it, retrive the password in encrypted form and decrypt it in the front end.
Using the access butil in password type for text isn't that useful by the
way. There are so many free encryption and decryption moduels availabel on
the net.
Hope this is what you were lookign for and hope it helped you.
Anand.