[Libusb-win32-devel] =?us-ascii?Q?usb=5Fclaim=5Finterface=28=29=20return=20negative=20without=20error=20message?=

[<MH...@se...>]

Hi,

 I've recently started with libusb-win32 and I've found some behaviour I didn't understand. I'm using Visual Studio with libusb.lib included.

 I tryed this:

                udev = usb_open(dev);
		if (udev) {
			if (usb_claim_interface(udev, 0)<0){ perror("Error"); }
....

 And the usb_claim_interface return -22 what perror couldn't interpret. It wrote me "Error: No error". What am I doing wrong?

Thanks for all your ideas.
Yours Martin Hasaj