As Suggestes above Lookup Filterdocument is best , apart from there check Look Up Filter Examples for gaining more concepts over Lookups as well as more Notes over it .
Hit kudo's if this was useful for you or rather if this ends the search for your question mark it as an solution .
Refer this link
http://na11.salesforce.com/help/doc/en/fields_lookup_filters_defining.htm
Thanks,
Hitesh Patel
Thanks Hitesh
Hi ,
As Suggestes above Lookup Filter document is best , apart from there check Look Up Filter Examples for gaining more concepts over Lookups as well as more Notes over it .
Hit kudo's if this was useful for you or rather if this ends the search for your question mark it as an solution .