DhcpUndoRequestParams

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

DWORD DhcpUndoRequestParams(
    DWORD Flags,   // optional
    void* Reserved,   // optional
    LPWSTR AdapterName,
    LPWSTR RequestIdStr
);

<DllImport("dhcpcsvc.dll", ExactSpelling:=True)>
Public Shared Function DhcpUndoRequestParams(
    Flags As UInteger,   ' DWORD optional
    Reserved As IntPtr,   ' void* optional
    <MarshalAs(UnmanagedType.LPWStr)> AdapterName As String,   ' LPWSTR
    <MarshalAs(UnmanagedType.LPWStr)> RequestIdStr As String   ' LPWSTR
) As UInteger
End Function

' Flags : DWORD optional
' Reserved : void* optional
' AdapterName : LPWSTR
' RequestIdStr : LPWSTR
Declare PtrSafe Function DhcpUndoRequestParams Lib "dhcpcsvc" ( _
    ByVal Flags As Long, _
    ByVal Reserved As LongPtr, _
    ByVal AdapterName As LongPtr, _
    ByVal RequestIdStr 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

DhcpUndoRequestParams = ctypes.windll.dhcpcsvc.DhcpUndoRequestParams
DhcpUndoRequestParams.restype = wintypes.DWORD
DhcpUndoRequestParams.argtypes = [
    wintypes.DWORD,  # Flags : DWORD optional
    ctypes.POINTER(None),  # Reserved : void* optional
    wintypes.LPCWSTR,  # AdapterName : LPWSTR
    wintypes.LPCWSTR,  # RequestIdStr : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dhcpcsvc.dll')
DhcpUndoRequestParams = Fiddle::Function.new(
  lib['DhcpUndoRequestParams'],
  [
    -Fiddle::TYPE_INT,  # Flags : DWORD optional
    Fiddle::TYPE_VOIDP,  # Reserved : void* optional
    Fiddle::TYPE_VOIDP,  # AdapterName : LPWSTR
    Fiddle::TYPE_VOIDP,  # RequestIdStr : LPWSTR
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpcsvc")]
extern "system" {
    fn DhcpUndoRequestParams(
        Flags: u32,  // DWORD optional
        Reserved: *mut (),  // void* optional
        AdapterName: *mut u16,  // LPWSTR
        RequestIdStr: *mut u16  // LPWSTR
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dhcpcsvc.dll")]
public static extern uint DhcpUndoRequestParams(uint Flags, IntPtr Reserved, [MarshalAs(UnmanagedType.LPWStr)] string AdapterName, [MarshalAs(UnmanagedType.LPWStr)] string RequestIdStr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dhcpcsvc_DhcpUndoRequestParams' -Namespace Win32 -PassThru
# $api::DhcpUndoRequestParams(Flags, Reserved, AdapterName, RequestIdStr)

#uselib "dhcpcsvc.dll"
#func global DhcpUndoRequestParams "DhcpUndoRequestParams" sptr, sptr, sptr, sptr
; DhcpUndoRequestParams Flags, Reserved, AdapterName, RequestIdStr   ; 戻り値は stat
; Flags : DWORD optional -> "sptr"
; Reserved : void* optional -> "sptr"
; AdapterName : LPWSTR -> "sptr"
; RequestIdStr : LPWSTR -> "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 "dhcpcsvc.dll"
#cfunc global DhcpUndoRequestParams "DhcpUndoRequestParams" int, sptr, wstr, wstr
; res = DhcpUndoRequestParams(Flags, Reserved, AdapterName, RequestIdStr)
; Flags : DWORD optional -> "int"
; Reserved : void* optional -> "sptr"
; AdapterName : LPWSTR -> "wstr"
; RequestIdStr : LPWSTR -> "wstr"

; DWORD DhcpUndoRequestParams(DWORD Flags, void* Reserved, LPWSTR AdapterName, LPWSTR RequestIdStr)
#uselib "dhcpcsvc.dll"
#cfunc global DhcpUndoRequestParams "DhcpUndoRequestParams" int, intptr, wstr, wstr
; res = DhcpUndoRequestParams(Flags, Reserved, AdapterName, RequestIdStr)
; Flags : DWORD optional -> "int"
; Reserved : void* optional -> "intptr"
; AdapterName : LPWSTR -> "wstr"
; RequestIdStr : LPWSTR -> "wstr"

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

var (
	dhcpcsvc = windows.NewLazySystemDLL("dhcpcsvc.dll")
	procDhcpUndoRequestParams = dhcpcsvc.NewProc("DhcpUndoRequestParams")
)

// Flags (DWORD optional), Reserved (void* optional), AdapterName (LPWSTR), RequestIdStr (LPWSTR)
r1, _, err := procDhcpUndoRequestParams.Call(
	uintptr(Flags),
	uintptr(Reserved),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(AdapterName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(RequestIdStr))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpUndoRequestParams(
  Flags: DWORD;   // DWORD optional
  Reserved: Pointer;   // void* optional
  AdapterName: PWideChar;   // LPWSTR
  RequestIdStr: PWideChar   // LPWSTR
): DWORD; stdcall;
  external 'dhcpcsvc.dll' name 'DhcpUndoRequestParams';

result := DllCall("dhcpcsvc\DhcpUndoRequestParams"
    , "UInt", Flags   ; DWORD optional
    , "Ptr", Reserved   ; void* optional
    , "WStr", AdapterName   ; LPWSTR
    , "WStr", RequestIdStr   ; LPWSTR
    , "UInt")   ; return: DWORD

●DhcpUndoRequestParams(Flags, Reserved, AdapterName, RequestIdStr) = DLL("dhcpcsvc.dll", "dword DhcpUndoRequestParams(dword, void*, char*, char*)")
# 呼び出し: DhcpUndoRequestParams(Flags, Reserved, AdapterName, RequestIdStr)
# Flags : DWORD optional -> "dword"
# Reserved : void* optional -> "void*"
# AdapterName : LPWSTR -> "char*"
# RequestIdStr : LPWSTR -> "char*"
# 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)。