#ifndef _NTMISC_H
#if (PHNT_VERSION >= PHNT_WINDOWS_10_RS2)

// rev
NTSYSCALLAPI
NTSTATUS
NTAPI
NtAcquireProcessActivityReference(
    _Out_ PHANDLE ActivityReferenceHandle,
    _In_ HANDLE ParentProcessHandle,
    _In_ ULONG ProcessActivityType // PROCESS_ACTIVITY_TYPE
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwAcquireProcessActivityReference(
    _Out_ PHANDLE ActivityReferenceHandle,
    _In_ HANDLE ParentProcessHandle,
    _In_ ULONG ProcessActivityType // PROCESS_ACTIVITY_TYPE
    );

#endif
View code on GitHub