public static extern int usb_isochronous_setup_async(LibUsb_DevHandle dev, ref LibUsb_Context context, byte ep, int pktsize);
public static extern int usb_release_interface(LibUsb_DevHandle dev, int interfaceNum);
public static extern int usb_get_string_simple(LibUsb_DevHandle dev, int index, StringBuilder buf, int buflen);
public static extern int usb_interrupt_setup_async(LibUsb_DevHandle dev, ref LibUsb_Context context, byte ep);
public static extern int usb_control_msg(LibUsb_DevHandle dev, int requesttype, int request, int value, int index, byte[] bytes, int size, int timeout);
public static extern int usb_get_string(LibUsb_DevHandle dev, int index, int langid, StringBuilder buf, int buflen);
public static extern int usb_claim_interface(LibUsb_DevHandle dev, int interfaceNum);
private static extern int usb_clear_halt(LibUsb_DevHandle dev, uint ep);
private static extern int usb_reset(LibUsb_DevHandle dev);
private static extern int usb_resetep(LibUsb_DevHandle dev, uint ep);
private static extern int usb_interrupt_write(LibUsb_DevHandle dev, int ep, byte[] bytes, int size, int timeout);
private static extern int usb_get_descriptor_by_endpoint(LibUsb_DevHandle udev, int ep, byte type, byte index, IntPtr buf, int size);
private static extern IntPtr usb_device(LibUsb_DevHandle dev);
public static extern int usb_set_altinterface(LibUsb_DevHandle dev, int alternate);
public static extern int usb_close(LibUsb_DevHandle dev);
public static extern int usb_set_configuration(LibUsb_DevHandle dev, int configuration);
private static extern int usb_bulk_read(LibUsb_DevHandle dev, int ep, byte[] bytes, int size, int timeout);