query regarding mail user creation...

hello sir, my name is navdeep singh, i'm working in a web development company in india. i'm working on a project having mail system in it. which is almost ready.. so i've the problem that how can i create user through php generated web page. rest of the application is done perfectly by manually created users on linux server. i'm using Sendmail and php4 for the project development. please guide me sir, how can i create users? i'm very much upset with that. i didn't found any solution regarding this problem... regards, navdeep __________________________________________________ Do You Yahoo!? Yahoo! GeoCities - quick and easy web site hosting, just $8.95/month. http://geocities.yahoo.com/ps/info1