zip code distance calculations

we provide all zip codes in contential United States. you provide formula and dll to execute program\ 1. we give a zip code , input into sql db, your programs sees that input and calculates to show all zip codes within y miles from that zip code. Example: zip code 40505 input into db, you then calulate and show all zip codes within 20 miles radus of that zip code if y= 20 miles). And sililarily do same to show zip codes in the indivudual states : list them in a sql db. So, if 40505 is listed, the show (list in db all zip codes associated with that state (Kentucky) ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform windows