I've never had any problem with WiFi. I simply set the network port to en1 in the VM configuration screen and it works on my MacBookPro over the airport connection. Windows doesn't know or care if it's using a wireless connection. When I move the VM to my iMac I switch it to en0 and it still works, while Windows doesn't notice the difference and continues to work the same. Don't try to use any of the wireless setup tools in Windows - it's not needed.