Consider the following scenario. You use a credential manager dynamic link library (DLL) to receive password change notifications on a Windows Vista-based computer. You press CTRL+ALT+DEL to access the Windows Security box. Then, you click Change a password to manually change the password for an account that is logged on to Windows Vista. In this scenario, the Multiple Provider Router (MPR) calls the NPPasswordChangeNotify function to notify the credential manager DLL of a password change event, even though the password change is unsuccessful.