這個最清楚  use this
http://blog.xuite.net/yh96301/blog/69378815-Windows+8%E7%AD%86%E8%A8%98%E5%9E%8B%E9%9B%BB%E8%85%A6%E8%A8%AD%E5%AE%9A%E7%82%BA%E7%84%A1%E7%B7%9A%E5%9F%BA%E5%9C%B0%E5%8F%B0

http://win.dyu.edu.tw/winap.htm

http://lifehacker.com/turn-a-windows-8-1-pc-into-a-wi-fi-hotspot-with-the-com-1593327340

command:
netsh wlan set hostednetwork mode=allow ssid=MarkWilson key=Lifehacker

netsh wlan start hostednetwork

Allow other network users to connect

hostednetwork  is virtual lan card name
ssid and key….. wifi

can not use