wired or wireless laptop : What's the IP?

My 2 main machines at home are my development desktop and my laptop. The laptop is usually connected using its wireless interface.
However, I occasionally plug the ethernet cable, especially when I need to perform a large file transfer. The problem then is that the laptop's IP changes (it uses DHCP for both interfaces)... Which leads to my desktop not finding it by name anymore... Which is frustrating because I have to type IPCONFIG in the laptop and then type the IP in Windows Explorer on the other computer... And I'll have to do the same again when I switch back to wireless...

If only I could erase the name cache in the other computer to force it find the laptop's new address!

Well, you can:

C:\windows\system32>nbtstat -R

Note that the -R must be capital.