Virtual PC wireless network problem

Windows in VPC should not try to connect to your wireless router. Your Mac should connect to the wireless router. Then in VPC turn on Network Sharing or Shared Network or something like that. Sorry, I don't have it in front of me right now, but I hope you get the idea. VPC will then be able to use the internet that OS X has.

 

You can either use the Shared Networking (NAT) option or you can select your Airport card in the network settings panel.

VPC will use it as a standard NIC, not a wireless NIC, so it should grab an IP from your router/dhcp server just as usual.

EDIT: I should add that OS X will control connecting to a wireless network, so as long as it is connected, your VPC guest OS should get an IP. If OS X has issues connecting to an AP, then your guest OS will consider it to be a disconnected link.