NTPSAPI.H

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

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

and draws from it the following type definitions:

Line Number	Type
589	struct _PROCESS_DISK_COUNTERS
620	struct _THREAD_ENERGY_VALUES
624	struct _PROCESS_ENERGY_VALUES
652	struct _COUNTER_READING
666	struct _THREAD_PERFORMANCE_DATA
1631	struct _PS_PROTECTION
1646	enum _PS_PROTECTED_SIGNER
2189	struct _JOBOBJECT_WAKE_FILTER
2219	enum _PS_WAKE_REASON

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

Anti-Trust Settlement Forensics

For the record, here are the very many more types that Microsoft’s freely published URLMON.PDB reveals were accessible to the source code for URLMON.DLL from including NTPSAPI.H when building Internet Explorer for the original release of 32-bit Windows 10:

Line Number	Type
390	struct _Wx86TIB
437	struct _INITIAL_TEB
438	unnamed struct OldInitialTeb in struct _INITIAL_TEB
461	struct _PROCESS_PRIORITY_CLASS
466	struct _PROCESS_FOREGROUND_BACKGROUND
475	enum _PROCESS_TLS_INFORMATION_TYPE
484	struct _THREAD_TLS_INFORMATION
497	struct _PROCESS_TLS_INFORMATION
531	struct _PROCESS_BASIC_INFORMATION64
542	struct _PROCESS_EXTENDED_BASIC_INFORMATION64
567	struct _PROCESS_CYCLE_TIME_INFORMATION
579	struct _PROCESS_INSTRUMENTATION_CALLBACK_INFORMATION
589	struct _PROCESS_DISK_COUNTERS
601	enum _PROCESS_ENERGY_COMPONENT_TYPE_NUM
620	struct _THREAD_ENERGY_VALUES
624	struct _PROCESS_ENERGY_VALUES
652	struct _COUNTER_READING
666	struct _THREAD_PERFORMANCE_DATA
679	struct _THREAD_PROFILING_INFORMATION
692	struct _PROCESS_WS_WATCH_INFORMATION_EX
704	union _PROCESS_AFFINITY_UPDATE_MODE
719	union _PROCESS_MEMORY_ALLOCATION_MODE
733	struct _PROCESS_WINDOW_INFORMATION
745	struct _PROCESS_HANDLE_TABLE_ENTRY_INFO
756	struct _PROCESS_HANDLE_SNAPSHOT_INFORMATION
774	struct _PROCESS_STACK_ALLOCATION_INFORMATION
780	struct _PROCESS_STACK_ALLOCATION_INFORMATION_EX
794	struct _PROCESS_MITIGATION_POLICY_INFORMATION
834	struct _PROCESS_FAULT_INFORMATION
845	struct _PROCESS_TELEMETRY_ID_INFORMATION
873	struct _PROCESS_COMMIT_RELEASE_INFORMATION
892	struct _THREAD_BASIC_INFORMATION
907	struct _THREAD_TEB_INFORMATION
919	struct _THREAD_LAST_SYSCALL_INFORMATION
932	struct _THREAD_CYCLE_TIME_INFORMATION
956	struct _PS_CPU_QUOTA_QUERY_ENTRY
961	struct _PS_CPU_QUOTA_QUERY_INFORMATION
966	struct _PS_CPU_QUOTA_SET_INFORMATION
971	struct _PROCESS_HANDLE_INFORMATION
980	struct _FIBER
1094	enum _PS_ATTRIBUTE_NUM
1122	struct _PS_ATTRIBUTE
1132	struct _PS_ATTRIBUTE_LIST
1185	struct _PS_MEMORY_RESERVE
1190	enum PS_CREATE_STATE
1215	enum _PS_STD_HANDLE_STATE
1222	struct _PS_STD_HANDLE_INFO
1631	struct _PS_PROTECTION
1646	enum _PS_PROTECTED_SIGNER
1661	enum _PS_PROTECTED_TYPE
1712	struct _PS_CREATE_INFO
1716	unnamed struct InitState in struct _PS_CREATE_INFO
1734	unnamed struct FailSection in struct _PS_CREATE_INFO
1738	unnamed struct ExeFormat in struct _PS_CREATE_INFO
1742	unnamed struct ExeName in struct _PS_CREATE_INFO
1746	unnamed struct SuccessState in struct _PS_CREATE_INFO
1911	struct _X86_CALL_FRAME
1939	struct _CALL_FRAME
2163	struct _JOBOBJECT_EXTENDED_ACCOUNTING_INFORMATION
2189	struct _JOBOBJECT_WAKE_FILTER
2198	struct _JOBOBJECT_FREEZE_INFORMATION
2219	enum _PS_WAKE_REASON
2228	struct _JOBOBJECT_WAKE_INFORMATION_V1
2233	struct _JOBOBJECT_WAKE_INFORMATION
2243	struct _JOBOBJECT_INTERFERENCE_INFORMATION
2247	struct _JOBOBJECT_MEMORY_USAGE_INFORMATION
2254	struct _JOBOBJECT_MEMORY_USAGE_INFORMATION_V2
2275	struct _JOBOBJECT_NOTIFICATION_LIMIT_INFORMATION_V2
2301	struct _JOBOBJECT_LIMIT_VIOLATION_INFORMATION_V2
2403	enum _MEMORY_RESERVE_TYPE
2430	struct _PS_SYSTEM_DLL_INIT_BLOCK
2460	struct _PS_PKG_CLAIM

This looks to be a complete reckoning of named classes, enumerations, structures and unions that are defined in the unseen NTPSAPI.H. A contemporaneous statically linked library named CLFSMGMT.LIB has its type information from creating a pre-compiled header, such that it almost certainly is complete for its inclusions from NTPSAPI.H, and yet it adds only anonymous structures and unions that are nested within the types listed above.