#ifndef _NTOBAPI_H
//
// Directory objects
//
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * Opens an existing directory object.
 * 
 * @param DirectoryHandle A handle to the newly opened directory object.
 * @param DesiredAccess An ACCESS_MASK that specifies the requested access to the directory object.
 * @param ObjectAttributes The attributes for the directory object.
 * @return NTSTATUS Successful or errant status.
 * @sa https://learn.microsoft.com/en-us/windows/win32/devnotes/ntopendirectoryobject
 */
NTSYSCALLAPI
NTSTATUS
NTAPI
NtOpenDirectoryObject(
    _Out_ PHANDLE DirectoryHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

NTSYSCALLAPI
NTSTATUS
NTAPI
ZwOpenDirectoryObject(
    _Out_ PHANDLE DirectoryHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes
    );

#endif
View code on GitHub