How to read data from a USB device in Windows32

[Hopestation]

Hi.

I am writing an application which communicates with 2 external devices: a KKSystems USB-485 converter to connect to a Eurotherm controller and a Prologix GPIB-USB converter to connect to a Fluke multimeter.

Both converters contain the same FTDI ic, so I can't identify which converter is attached to which COM port.

I have downloaded Microsoft's USBVIEW utility which shows me that one device is:-:

iProduct:             0x02
0x0409: "Prologix GPIB-USB Controller"

and the other is:-

iProduct:             0x02
0x0409: "USB Serial Converter"

I have looked at libusb, but this appears to be for Linux systems only.

USB.PAS is written by Apple, so I assume the same applies.

Is there a Windows library for accessing USB data?

Can anyone provide an example?

[Leledumbo]

I have looked at libusb, but this appears to be for Linux systems only.

No, it's cross platform.

[mas steindorff]

For windows, the registry is the key is your problem.  Each comm port will give you a name that you can follow to your USB device.  Use regedit to track the strings you gave above.

[Blestan]

Try the SynaSer package from synapse
i think it support USB ports and it's cross platform