Windows 7 comes with a new feature for sharing your computers internet connection. Now you can do it wirelessly. Well, As long as your system’s wireless network adapter supports Windows 7 “virtual wi-fi” feature, you can do it.
Open an elevated command prompt (Type “CMD.EXE” in the start menu search bar, then right click the cmd.exe link and select “Run as Administrator”).
- In the command window, type: 
netsh wlan set hostednetwork mode=allow ssid=MyNet key=MyPassword
Replace “MyNet” with the name you want to use for the wireless network and replace “MyPassword” with your chosen password for accessing it) - Press Enter.
 - Now type: 
netsh wlan start hostednetwork - Press Enter.
 - Open Control Panel and go to Network and Sharing Center.
 - Click Change Adapter Settings.
 - Right click your Internet connection and select Properties.
 - Click the Sharing tab.
 - Check the box that says “Allow other network users to connect.”
 - Choose your virtual wi-fi adapter and click OK.