libusb_hotplug_register_callback

function libusb_hotplug_register_callback(

  ctx: plibusb_context;

  events: libusb_hotplug_event;

  flags: libusb_hotplug_flag;

  vendor_id: Integer;

  product_id: Integer;

  dev_class: Integer;

  cb_fn: libusb_hotplug_callback_fn;

  user_data: pointer;

  var handle: libusb_hotplug_callback_handle

):Integer;