Google Like Search textbox

Ajax

http://www.codeproject.com/KB/aspnet/Search_SuggestTextBox.aspx

Jquery:
http://www.eggheadcafe.com/tutorials/aspnet/18b6a1fa-a7cf-4507-84f2-15056fe65bb7/autocompletion-with-jque.aspx


webservice:
http://www.dotnetspider.com/forum/266496-Create-application-ASP-net-like-Google-search.aspx