LibUsb and C#

[eusebiu]

Hello!
Did anyone used LibUsb-Win32 library or #usblib?
If so, I am getting an -22 error when I try to use BulkRead method.
The connected device is found but I can't read from it.

//code C#
IntPtr deviceHandle =
NativeMethods.usb_open(descriptor.NativeDevice);// returns a non-Zero
value - OK

//////////
NativeMethods.usb_set_configuration(deviceHandle, 1);
NativeMethods.usb_claim_interface(deviceHandle, 0);
NativeMethods.usb_set_altinterface(deviceHandle, 0);

//.. all methods return 0 = SUCCESS

NativeMethods is a class that wraps libusb0.dll

Any ideeas?

Thanks