NtLoadKey3 - NtDoc

#ifndef _NTREGAPI_H
// rev by tyranid
#if (PHNT_VERSION >= PHNT_20H1)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtLoadKey3(
    _In_ POBJECT_ATTRIBUTES TargetKey,
    _In_ POBJECT_ATTRIBUTES SourceFile,
    _In_ ULONG Flags,
    _In_reads_(ExtendedParameterCount) PCM_EXTENDED_PARAMETER ExtendedParameters,
    _In_ ULONG ExtendedParameterCount,
    _In_opt_ ACCESS_MASK DesiredAccess,
    _Out_opt_ PHANDLE RootHandle,
    _Reserved_ PVOID Reserved
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwLoadKey3(
    _In_ POBJECT_ATTRIBUTES TargetKey,
    _In_ POBJECT_ATTRIBUTES SourceFile,
    _In_ ULONG Flags,
    _In_reads_(ExtendedParameterCount) PCM_EXTENDED_PARAMETER ExtendedParameters,
    _In_ ULONG ExtendedParameterCount,
    _In_opt_ ACCESS_MASK DesiredAccess,
    _Out_opt_ PHANDLE RootHandle,
    _Reserved_ PVOID Reserved
    );

#endif
View code on GitHub