libusb_hotplug_callback_handle
int libusb_hotplug_register_callback(libusb_context *ctx, libusb_hotplug_event events, libusb_hotplug_flag flags, int vendor_id, int product_id, int dev_class, libusb_hotplug_callback_fn cb_fn, void *user_data, libusb_hotplug_callback_handle *handle);
void libusb_hotplug_deregister_callback(libusb_context *ctx, libusb_hotplug_callback_handle handle);
libusb_hotplug_callback_handle callback_handle);
libusb_hotplug_filter(libusb_context *ctx, libusb_hotplug_callback_handle pcbh,
libusb_hotplug_callback_handle acbh;
libusb_hotplug_callback_handle bcbh;
libusb_hotplug_callback_handle *phandle)
libusb_hotplug_callback_handle handle;
libusb_hotplug_callback_handle handle)
libusb_hotplug_callback_handle callback_handle)
libusb_hotplug_callback_handle handle;