I'm fairly sure I won't be the first or last to say this but you *may* want to look towards DBI for all your database interfacing with perl. However if you're determined to use msgget, msgsnd and msgrcv then you'll probably want to check out the likes of IPC::SysV. Also if you're doing webby stuff you'll also want to be reading up on the fantabulous CGI.
HTH

broquaint