Paulo Breda

A chat would probably be best writen in Java. You can learn how to make an applet. look for pergesu on here he knows Java.

http://java.sun.com

For a post... I assume you mean a bulleting board. You might want to try

Perl
PHP/MySQL
Python
Delphi
JSP
ASP

any of those will allow you to code a web board.

If you start today you might know enough in about 1 year to code a full bulletin board like this one.
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