making arp request

Hi,
I need to make an arp request to a computer on the network ...
Can anyone suggest how to do it??
Any tutorial links???
Thank you.

flush the arp cache on the computer you are using and then ping the computer, capture the request with wireshark or tcpdump. If you want to write a program then check out www.security-freak.net which has some good introductory tutorials to creating your own packets as well as general socket programming. Also check out beej's guide to network programming(google it), which is a good place to start as well.

Thanks a lot ...
That beej's guide is really great....