Automatically detect proxy server settings

I am using a DHCP & a proxy server in the network , Clients will be geeting the IPs from the DHCP . Now i have to ask them to enter the IP of the proxy to use internet . I want to know , how i can get the proxy seetings to the clients automatically . Without manualy doing it.

Dhcp assigns IP to the clients computer automatically. just try not to use proxy server first and lets see what happen.