NTRTL_X.H

Symbol files that Microsoft has published since Windows 8 tell of both user-mode and kernel-mode code that is compiled with the NTRTL_X.H header at

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

This NTRTL_X.H file is not in any generally released Windows Driver Kit (WDK) or Software Development Kit (SDK) or even in any old Device Driver Kit (DDK). Its existence has some public sign in plain text as a comment in IP2STRING.H, which says the latter was “Splited from ntrtl_x.h”, apparently in 2006. (The misspelling is Microsoft’s.)

User-Defined Types

Different symbol files have LF_UDT_SRC_LINE (0x1606) or even LF_UDT_MOD_SRC_LINE (0x1607) records for different selections of user-defined types (meaning classes, structures, unions and enumerations). The table below aggregates.

Many of the types that are known to be defined in NTRTL_X.H are also defined in one or another standard header from the WDK or SDK. The line numbers on the left are from the unseen NTRTL_X.H for the original release of 32-bit Windows 10, as known from symbol files. Those on the right are from the indicated headers, as readily available in the WDK or SDK for the same release.