RtlEthernetStringToAddressW

// ntdll.dll  (Unicode / -W)
#include <windows.h>

INT RtlEthernetStringToAddressW(
    LPCWSTR S,
    LPCWSTR* Terminator,
    DL_EUI48* Addr
);

<DllImport("ntdll.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function RtlEthernetStringToAddressW(
    <MarshalAs(UnmanagedType.LPWStr)> S As String,   ' LPCWSTR
    Terminator As IntPtr,   ' LPCWSTR* out
    Addr As IntPtr   ' DL_EUI48* out
) As Integer
End Function

' S : LPCWSTR
' Terminator : LPCWSTR* out
' Addr : DL_EUI48* out
Declare PtrSafe Function RtlEthernetStringToAddressW Lib "ntdll" ( _
    ByVal S As LongPtr, _
    ByVal Terminator As LongPtr, _
    ByVal Addr As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

RtlEthernetStringToAddressW = ctypes.windll.ntdll.RtlEthernetStringToAddressW
RtlEthernetStringToAddressW.restype = ctypes.c_int
RtlEthernetStringToAddressW.argtypes = [
    wintypes.LPCWSTR,  # S : LPCWSTR
    ctypes.c_void_p,  # Terminator : LPCWSTR* out
    ctypes.c_void_p,  # Addr : DL_EUI48* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ntdll.dll')
RtlEthernetStringToAddressW = Fiddle::Function.new(
  lib['RtlEthernetStringToAddressW'],
  [
    Fiddle::TYPE_VOIDP,  # S : LPCWSTR
    Fiddle::TYPE_VOIDP,  # Terminator : LPCWSTR* out
    Fiddle::TYPE_VOIDP,  # Addr : DL_EUI48* out
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "ntdll")]
extern "system" {
    fn RtlEthernetStringToAddressW(
        S: *const u16,  // LPCWSTR
        Terminator: *const *const u16,  // LPCWSTR* out
        Addr: *mut DL_EUI48  // DL_EUI48* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ntdll.dll", CharSet = CharSet.Unicode)]
public static extern int RtlEthernetStringToAddressW([MarshalAs(UnmanagedType.LPWStr)] string S, IntPtr Terminator, IntPtr Addr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ntdll_RtlEthernetStringToAddressW' -Namespace Win32 -PassThru
# $api::RtlEthernetStringToAddressW(S, Terminator, Addr)

#uselib "ntdll.dll"
#func global RtlEthernetStringToAddressW "RtlEthernetStringToAddressW" wptr, wptr, wptr
; RtlEthernetStringToAddressW S, varptr(Terminator), varptr(Addr)   ; 戻り値は stat
; S : LPCWSTR -> "wptr"
; Terminator : LPCWSTR* out -> "wptr"
; Addr : DL_EUI48* out -> "wptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "ntdll.dll"
#cfunc global RtlEthernetStringToAddressW "RtlEthernetStringToAddressW" wstr, var, var
; res = RtlEthernetStringToAddressW(S, Terminator, Addr)
; S : LPCWSTR -> "wstr"
; Terminator : LPCWSTR* out -> "var"
; Addr : DL_EUI48* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; INT RtlEthernetStringToAddressW(LPCWSTR S, LPCWSTR* Terminator, DL_EUI48* Addr)
#uselib "ntdll.dll"
#cfunc global RtlEthernetStringToAddressW "RtlEthernetStringToAddressW" wstr, var, var
; res = RtlEthernetStringToAddressW(S, Terminator, Addr)
; S : LPCWSTR -> "wstr"
; Terminator : LPCWSTR* out -> "var"
; Addr : DL_EUI48* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	ntdll = windows.NewLazySystemDLL("ntdll.dll")
	procRtlEthernetStringToAddressW = ntdll.NewProc("RtlEthernetStringToAddressW")
)

// S (LPCWSTR), Terminator (LPCWSTR* out), Addr (DL_EUI48* out)
r1, _, err := procRtlEthernetStringToAddressW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(S))),
	uintptr(Terminator),
	uintptr(Addr),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function RtlEthernetStringToAddressW(
  S: PWideChar;   // LPCWSTR
  Terminator: PPWideChar;   // LPCWSTR* out
  Addr: Pointer   // DL_EUI48* out
): Integer; stdcall;
  external 'ntdll.dll' name 'RtlEthernetStringToAddressW';

result := DllCall("ntdll\RtlEthernetStringToAddressW"
    , "WStr", S   ; LPCWSTR
    , "Ptr", Terminator   ; LPCWSTR* out
    , "Ptr", Addr   ; DL_EUI48* out
    , "Int")   ; return: INT

●RtlEthernetStringToAddressW(S, Terminator, Addr) = DLL("ntdll.dll", "int RtlEthernetStringToAddressW(char*, void*, void*)")
# 呼び出し: RtlEthernetStringToAddressW(S, Terminator, Addr)
# S : LPCWSTR -> "char*"
# Terminator : LPCWSTR* out -> "void*"
# Addr : DL_EUI48* out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。