NTETW.H

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

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

and draws from it the following type definition:

Line Number Type
268 enum _ETW_NOTIFICATION_TYPE

The header NTETW.H is published in the “minwin” directory of the Windows Driver Kit (WDK) for Windows 10 in the original and Version 1511 editions.