form builder

Hello frnds…Can any one tell me how to make a form builder where a user can make his own contact form after log in.What will be the data model for it?

This is very obvious question, asked thousand times here and to be honest - you should get -1 for being too lazy to even look into documentation!

Before asking suvh questions, please spend some time on reading tutorials, especially Definitive Guide and Blog Example where all your questions are answered with examples!