Automatically change DNS server

Looking for a program to automatically change DNS server, without me manually inputting the address each time. Prompts me to enter Preferred DNS server and Alternative DNS server, and changes those settings when applied. These needs to apply to IPv4 only. Program will also need to have a "turn off" feature, to return to default settings - blank. ## Deliverables [login to view URL] requirements notice: As originally posted, this project does not have complete details. Should a dispute arise and this project go into arbitration "as is", the contract's vagueness might cause it to be interpreted against you, even though you were acting in good-faith. So for your protection, if you are interested in this project, please work-out and document the requirements onsite.