[Libusb-win32-devel] =?iso-8859-15?Q?Re:_[Libusb-win32-devel]_usb=5Fclaim=5Finterface()_ret?= =?iso-8859-15?Q?urn_negative_without_error_message?=

[Stephan M. <ste...@we...>]

> 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);

You forgot to configure the device:

usb_set_configuration(udev, 1);

 
> 		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?
> 

Use usb_strerror() to retrieve a printable error message.

> Thanks for all your ideas.
> Yours Martin Hasaj
> 
> 
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