The Virtual Hid Device module is KMDF-only:

https://github.com/Microsoft/DMF/blob/8d126adc31c7c9d925dce7caa8ca016290babe79/Dmf/Modules.Library/Dmf_VirtualHidDeviceVhf.h#L24

However, the vhidmini2 sample is also supported in UMDF.

The difference seems to be in the code in kmdf/util.c and umdf2/util.c, but I don't see similar code in the DMF module.

Is there a reason for which the Virtual Hid module is implemented as KMDF-only?