#ifndef _NTOBAPI_H
//
// Symbolic links
//
#if (PHNT_MODE != PHNT_MODE_KERNEL)

/**
 * The NtCreateSymbolicLinkObject routine creates a symbolic link object.
 *
 * \param LinkHandle Pointer to a HANDLE variable that receives a handle to the symbolic link object.
 * \param DesiredAccess An ACCESS_MASK that specifies the requested access to the symbolic link object.
 * \param ObjectAttributes The attributes for the symbolic link object.
 * \param LinkTarget A pointer to a UNICODE_STRING that specifies the target name.
 * \return NTSTATUS Successful or errant status.
 * \sa https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/nf-wdm-zwcreatesymboliclinkobject
 * \remarks ObjectAttributes and LinkTarget are required pointers.
 * LinkTarget.Length must be even and no greater than MaximumLength after MaximumLength
 * is rounded down to an even value; that rounded maximum must be nonzero. For user-mode
 * callers the kernel copies MaximumLength bytes, not just Length: every advertised byte
 * must be readable. A terminator is preserved only if supplied in those copied bytes.
 * This creates an Object Manager link, not a file-system reparse point.
 */
_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
NtCreateSymbolicLinkObject(
    _Out_ PHANDLE LinkHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes,
    _In_ PCUNICODE_STRING LinkTarget
    );

#endif
#endif
View code on GitHub

#ifndef _NTZWAPI_H

_Kernel_entry_
NTSYSCALLAPI
NTSTATUS
NTAPI
ZwCreateSymbolicLinkObject(
    _Out_ PHANDLE LinkHandle,
    _In_ ACCESS_MASK DesiredAccess,
    _In_ POBJECT_ATTRIBUTES ObjectAttributes,
    _In_ PCUNICODE_STRING LinkTarget
    );

#endif
View code on GitHub