#ifndef _NTREGAPI_H
#if (PHNT_VERSION >= PHNT_WINDOWS_10_RS1)

/**
 * Rolls back a registry transaction.
 *
 * @param RegistryTransactionHandle Handle to the registry transaction.
 * @param Flags Reserved for future use.
 * @return NTSTATUS Successful or errant status.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtRollbackRegistryTransaction(
    _In_ HANDLE RegistryTransactionHandle,
    _Reserved_ ULONG Flags
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwRollbackRegistryTransaction(
    _In_ HANDLE RegistryTransactionHandle,
    _Reserved_ ULONG Flags
    );

#endif
View code on GitHub