When I perform this loop will I be able to get the handle for all devices as shown in Windows OS Device Manager? Or is there a limit to the number of devices OpenUnit can handle?

I the test setup I am considering I would need 12 Pico 1216 connected to the PC.

I'm still not sure on how to address an individual device. Tell me if the following is correct. Example Device1: After connecting usb to only this device and issuing OpenUnit the handle returned is 16384 Device2: After connecting usb to only this device and issuing OpenUnit the handle returned is 16...

Does each device have a unique static handle?
I only need to call OpenUnit function once then operate on each device by it handle?

Does each device have a unique static handle? Once I have all the handles for each device I use that as the input for a particular device with OpenUnit?

I want a test fixture that has 12 Picolog 1216 connected with USB.
I only want to address and use one at a time.

Looking at the driver pl1000OpenUnit I assume that handle is the identifier for an individual logger. How do I determine each handle for all 12 individual loggers?