EXCPT.H

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

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

and draws from it the following type definition:

Line Number Type
39 enum _EXCEPTION_DISPOSITION

The header EXCPT.H has long been supplied with Microsoft’s C compiler.