how can i get the aol or outlook address books when the user inserts his username and password I saw many programns that do it maybe someone has the source code?
I found a very nice one for yahoo gmail and hotmail
https://sourceforge.net/projects/opencontactsnet/
You can't get the Outlook address books since they're on the user's machine - they would need to export to CSV and upload. There are a lot of tutorials out there for importing CSV files using ASP.NET.
It looks like you can't get AOL contacts either - according to this article they're the only major email provider that hasn't provided a public address book API.