DEVPROPDEFP.H

The public symbol file NTKRPAMP.PDB for the original release of Windows 10 tells that the kernel is built with the DEVPROPDEFP.H header at

d:\th.public.fre\internal\sdk\inc

and draws from it the following type definition:

The header DEVPROPDEFP.H is not known in any Device Driver Kit (DDK) or Windows Driver Kit (WDK).