NtSetSystemEnvironmentValue - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers
#ifndef _NTEXAPI_H
#if (PHNT_MODE != PHNT_MODE_KERNEL)

NTSYSCALLAPI
NTSTATUS
NTAPI
NtSetSystemEnvironmentValue(
    _In_ PUNICODE_STRING VariableName,
    _In_ PUNICODE_STRING VariableValue
    );

#endif
#endif

View code on GitHub
#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwSetSystemEnvironmentValue(
    _In_ PUNICODE_STRING VariableName,
    _In_ PUNICODE_STRING VariableValue
    );

#endif

View code on GitHub

Seems not works on NT 4.0 SP6...

Documented by

Requirements

Privilege: SE_SYSTEM_ENVIRONMENT_NAME

See also