NtUnloadKey2 - NtDoc

#ifndef _NTREGAPI_H

/**
 * Unloads a registry key with additional flags.
 * 
 * @param TargetKey Pointer to the object attributes of the target key.
 * @param Flags Flags for the unload operation.
 * @return NTSTATUS Successful or errant status.
 * @remarks Valid flags are REG_FORCE_UNLOAD and REG_UNLOAD_LEGAL_FLAGS.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtUnloadKey2(
    _In_ POBJECT_ATTRIBUTES TargetKey,
    _In_ ULONG Flags
    );

#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwUnloadKey2(
    _In_ POBJECT_ATTRIBUTES TargetKey,
    _In_ ULONG Flags
    );

#endif
View code on GitHub