When you use the "Dial-Up Networking" module for connecting to the internet or to other networks, the operating system give you the option to store the password and use it when it needed. Although the password is constantly stored in your computer, the operating system doesn't allow you to Watch It. if you forget your password and you want to Extract it from your computer, you can use the Dialupass utility for viewing the password.
This utility enumerates all Dial-Up entries on your computer and reveals their logon Details: User Name, Password and Domain.