I'm trying to get a list of all USB devices on a Windows System using VC++ and Windows Backend of LibUSB. But it seems the libusb_get_config_descriptor(dev, 0, &config); returns a negative value.
static void print_devs(libusb_device **devs)
{
libusb_device *dev;
int i = 0;
while ((dev = devs[i++]) != NULL) {
struct libusb_config_descriptor *config;
int rr = libusb_get_config_descriptor(dev, 0, &config);
if ( rr!= 0)
{
printf("Error!! %d",rr);
return;
}
//get interface descriptors and interface class and sub class so on...
Why is this happening?
