How to list all computers in a windows wi-fi network?

I have used following procedure:

1. Open Run (⊞ Win+R)
2. Type cmd and click OK.
3. Ping the server if you know or your gateway. Even if there is requested timed out.
4. Type the command arp -a .
5. It will usually list down all the IP's and Computers with their Mac Addresses.

If you want to use a GUI tool. I recommend IPScan. Although it is a light application (433KB), it is freeware that's always worked for me.

You can also use another GUI Tool, Advance IP Scanner.

net view will probably show most of them.