i need to connect workstation of 10-12 desktops through wireless netwrok.can any one tell me what should i do??

Well first you have to think. Your 10-12 workstations might not have the same kind of wireless cards that can receive some newer frequencies. So go to each workstation and see if what is the best signal each workstation can get. Then you can think about what wireless router to get to get them on wireless.