Thanks perlofwisdom for the reply. I've never used the sc command before, and it was interesting to learn about it. However, I don't think this helps with the current problem, since all of the service names that show up in the sc command look "normal" (Wmi, WinVNC4, etc).

I'm looking for a service name in hex, of the form 8BAA28BF-8565-43BE-81C0-E7BBD94187D3, which is stuff that looks like it comes out of the windows registry (I could be wrong on this, I'm hoplessly confused by windows musty innards). I need this type of service name, so I can use Win32::File::CreateFile() on it to create a device file, so I can do an IOCTL on it, to speak directly with the currently running device driver, to have it dump out the permanent MAC address of the hardware, and the current MAC address that the device driver is using (they can be different). Whew...

Excruciating details on this whole effort can be found in id:639048

Putting the question another way. How can I get the hex service name of a device, without knowing the hardcoded $dev value in my example script?

Thanks

-Craig