Windows provides this functionality automatically. If uesrs are running
Windows 2K, they can press Control Alt Delete and then click on change
password to change their password whenever they would like.
Of course they will need to meet any password requirements (eg length) and
have the right permissions to do so.
as default them can do this by press ctrl + alt + del and
use the buttom change password..you can simple write an
application (script) for this if you want to.. or let them
accees Active Directory Users and Computers tools,