How to write codes for neural network?

Hi, I am fairly new to neural network in MATLAB. Can someone please help me with this problem? I have 4 columns data in an excel file. I would like to write a program that reads the input data and target data and trains it in neural network so that it is divided into 4 classes. Output should state which class it belongs to. After training, any new data entered should display message that states which class it is. Can someone help me with an example of codes that would solve this problem?

Thank you very much for your help.

-Shoumy

[Ahmed]

To read Excel data, take a look at:

doc xlsread

and for the neural network

doc patternnet

[Greg Heath]

Also search the NEWSGROUP and ANSWERS for examples using the searchword patternnet