Ok, I found the library to add, SetupAPI.lib. and my program now runs, but all I get our when printing the pwszInstanceId is the same value for all of the devices.
What I'm looking for is something like what the Device Manager supplies under Properties->Events->Information, i.e.: "\VID_0483&PID_5740\11_0027004A_3235510C_33333432".
This includes the USB Vid and Pid which will allow me to find my device, I also will need to connect that to the COM? id.
Greg