NtOpenJobObject - NtDoc

#ifndef _NTPSAPI_H
// Job objects
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * Opens an existing job object.
 *
 * @param JobHandle A handle to the job object.
 * @param DesiredAccess The access rights desired for the thread object.
 * @param ObjectAttributes Optional. A pointer to an OBJECT_ATTRIBUTES structure that specifies the attributes of the new thread.
 * @return NTSTATUS Successful or errant status.
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtOpenJobObject(
    _Out_ PHANDLE JobHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ PCOBJECT_ATTRIBUTES ObjectAttributes
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwOpenJobObject(
    _Out_ PHANDLE JobHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ PCOBJECT_ATTRIBUTES ObjectAttributes
    );

#endif
View code on GitHub