DhcpCreateOptionV5

// DHCPSAPI.dll
#include <windows.h>

DWORD DhcpCreateOptionV5(
    LPWSTR ServerIpAddress,   // optional
    DWORD Flags,
    DWORD OptionId,
    LPWSTR ClassName,   // optional
    LPWSTR VendorName,   // optional
    DHCP_OPTION* OptionInfo
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpCreateOptionV5(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPWSTR optional
    Flags As UInteger,   ' DWORD
    OptionId As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> ClassName As String,   ' LPWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> VendorName As String,   ' LPWSTR optional
    OptionInfo As IntPtr   ' DHCP_OPTION* in/out
) As UInteger
End Function

' ServerIpAddress : LPWSTR optional
' Flags : DWORD
' OptionId : DWORD
' ClassName : LPWSTR optional
' VendorName : LPWSTR optional
' OptionInfo : DHCP_OPTION* in/out
Declare PtrSafe Function DhcpCreateOptionV5 Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal Flags As Long, _
    ByVal OptionId As Long, _
    ByVal ClassName As LongPtr, _
    ByVal VendorName As LongPtr, _
    ByVal OptionInfo As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DhcpCreateOptionV5 = ctypes.windll.dhcpsapi.DhcpCreateOptionV5
DhcpCreateOptionV5.restype = wintypes.DWORD
DhcpCreateOptionV5.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPWSTR optional
    wintypes.DWORD,  # Flags : DWORD
    wintypes.DWORD,  # OptionId : DWORD
    wintypes.LPCWSTR,  # ClassName : LPWSTR optional
    wintypes.LPCWSTR,  # VendorName : LPWSTR optional
    ctypes.c_void_p,  # OptionInfo : DHCP_OPTION* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpCreateOptionV5 = Fiddle::Function.new(
  lib['DhcpCreateOptionV5'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPWSTR optional
    -Fiddle::TYPE_INT,  # Flags : DWORD
    -Fiddle::TYPE_INT,  # OptionId : DWORD
    Fiddle::TYPE_VOIDP,  # ClassName : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # VendorName : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # OptionInfo : DHCP_OPTION* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpCreateOptionV5(
        ServerIpAddress: *mut u16,  // LPWSTR optional
        Flags: u32,  // DWORD
        OptionId: u32,  // DWORD
        ClassName: *mut u16,  // LPWSTR optional
        VendorName: *mut u16,  // LPWSTR optional
        OptionInfo: *mut DHCP_OPTION  // DHCP_OPTION* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpCreateOptionV5([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, uint Flags, uint OptionId, [MarshalAs(UnmanagedType.LPWStr)] string ClassName, [MarshalAs(UnmanagedType.LPWStr)] string VendorName, IntPtr OptionInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpCreateOptionV5' -Namespace Win32 -PassThru
# $api::DhcpCreateOptionV5(ServerIpAddress, Flags, OptionId, ClassName, VendorName, OptionInfo)

#uselib "DHCPSAPI.dll"
#func global DhcpCreateOptionV5 "DhcpCreateOptionV5" sptr, sptr, sptr, sptr, sptr, sptr
; DhcpCreateOptionV5 ServerIpAddress, Flags, OptionId, ClassName, VendorName, varptr(OptionInfo)   ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; Flags : DWORD -> "sptr"
; OptionId : DWORD -> "sptr"
; ClassName : LPWSTR optional -> "sptr"
; VendorName : LPWSTR optional -> "sptr"
; OptionInfo : DHCP_OPTION* in/out -> "sptr"
; ※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 "DHCPSAPI.dll"
#cfunc global DhcpCreateOptionV5 "DhcpCreateOptionV5" wstr, int, int, wstr, wstr, var
; res = DhcpCreateOptionV5(ServerIpAddress, Flags, OptionId, ClassName, VendorName, OptionInfo)
; ServerIpAddress : LPWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; OptionId : DWORD -> "int"
; ClassName : LPWSTR optional -> "wstr"
; VendorName : LPWSTR optional -> "wstr"
; OptionInfo : DHCP_OPTION* in/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。

; DWORD DhcpCreateOptionV5(LPWSTR ServerIpAddress, DWORD Flags, DWORD OptionId, LPWSTR ClassName, LPWSTR VendorName, DHCP_OPTION* OptionInfo)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpCreateOptionV5 "DhcpCreateOptionV5" wstr, int, int, wstr, wstr, var
; res = DhcpCreateOptionV5(ServerIpAddress, Flags, OptionId, ClassName, VendorName, OptionInfo)
; ServerIpAddress : LPWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; OptionId : DWORD -> "int"
; ClassName : LPWSTR optional -> "wstr"
; VendorName : LPWSTR optional -> "wstr"
; OptionInfo : DHCP_OPTION* in/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 (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpCreateOptionV5 = dhcpsapi.NewProc("DhcpCreateOptionV5")
)

// ServerIpAddress (LPWSTR optional), Flags (DWORD), OptionId (DWORD), ClassName (LPWSTR optional), VendorName (LPWSTR optional), OptionInfo (DHCP_OPTION* in/out)
r1, _, err := procDhcpCreateOptionV5.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(Flags),
	uintptr(OptionId),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ClassName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(VendorName))),
	uintptr(OptionInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpCreateOptionV5(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  Flags: DWORD;   // DWORD
  OptionId: DWORD;   // DWORD
  ClassName: PWideChar;   // LPWSTR optional
  VendorName: PWideChar;   // LPWSTR optional
  OptionInfo: Pointer   // DHCP_OPTION* in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpCreateOptionV5';

result := DllCall("DHCPSAPI\DhcpCreateOptionV5"
    , "WStr", ServerIpAddress   ; LPWSTR optional
    , "UInt", Flags   ; DWORD
    , "UInt", OptionId   ; DWORD
    , "WStr", ClassName   ; LPWSTR optional
    , "WStr", VendorName   ; LPWSTR optional
    , "Ptr", OptionInfo   ; DHCP_OPTION* in/out
    , "UInt")   ; return: DWORD

●DhcpCreateOptionV5(ServerIpAddress, Flags, OptionId, ClassName, VendorName, OptionInfo) = DLL("DHCPSAPI.dll", "dword DhcpCreateOptionV5(char*, dword, dword, char*, char*, void*)")
# 呼び出し: DhcpCreateOptionV5(ServerIpAddress, Flags, OptionId, ClassName, VendorName, OptionInfo)
# ServerIpAddress : LPWSTR optional -> "char*"
# Flags : DWORD -> "dword"
# OptionId : DWORD -> "dword"
# ClassName : LPWSTR optional -> "char*"
# VendorName : LPWSTR optional -> "char*"
# OptionInfo : DHCP_OPTION* in/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)。