Help: update the FW of USB device through WU

[AlbertG123]

we have USB device plug in the system, these USB devices use HID inbox driver.
and these device are following DFU spec （https://www.usb.org/sites/default/files/DFU_1.1.pdf）.
we are going to workout a driver to update the firmware on these USB device.
can you help guide me which sample code is for this case?
thank you very much