NtSubscribeWnfStateChange - NtDoc

#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)
#if (PHNT_VERSION >= PHNT_WIN8)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtSubscribeWnfStateChange(
    _In_ PCWNF_STATE_NAME StateName,
    _In_opt_ WNF_CHANGE_STAMP ChangeStamp,
    _In_ ULONG EventMask,
    _Out_opt_ PULONG64 SubscriptionId
    );

#endif
#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwSubscribeWnfStateChange(
    _In_ PCWNF_STATE_NAME StateName,
    _In_opt_ WNF_CHANGE_STAMP ChangeStamp,
    _In_ ULONG EventMask,
    _Out_opt_ PULONG64 SubscriptionId
    );

#endif
View code on GitHub