McastReleaseAddress

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

DWORD McastReleaseAddress(
    WORD AddrFamily,
    MCAST_CLIENT_UID* pRequestID,
    MCAST_LEASE_REQUEST* pReleaseRequest
);

<DllImport("dhcpcsvc.dll", ExactSpelling:=True)>
Public Shared Function McastReleaseAddress(
    AddrFamily As UShort,   ' WORD
    pRequestID As IntPtr,   ' MCAST_CLIENT_UID* in/out
    pReleaseRequest As IntPtr   ' MCAST_LEASE_REQUEST* in/out
) As UInteger
End Function

' AddrFamily : WORD
' pRequestID : MCAST_CLIENT_UID* in/out
' pReleaseRequest : MCAST_LEASE_REQUEST* in/out
Declare PtrSafe Function McastReleaseAddress Lib "dhcpcsvc" ( _
    ByVal AddrFamily As Integer, _
    ByVal pRequestID As LongPtr, _
    ByVal pReleaseRequest 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

McastReleaseAddress = ctypes.windll.dhcpcsvc.McastReleaseAddress
McastReleaseAddress.restype = wintypes.DWORD
McastReleaseAddress.argtypes = [
    ctypes.c_ushort,  # AddrFamily : WORD
    ctypes.c_void_p,  # pRequestID : MCAST_CLIENT_UID* in/out
    ctypes.c_void_p,  # pReleaseRequest : MCAST_LEASE_REQUEST* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dhcpcsvc.dll')
McastReleaseAddress = Fiddle::Function.new(
  lib['McastReleaseAddress'],
  [
    -Fiddle::TYPE_SHORT,  # AddrFamily : WORD
    Fiddle::TYPE_VOIDP,  # pRequestID : MCAST_CLIENT_UID* in/out
    Fiddle::TYPE_VOIDP,  # pReleaseRequest : MCAST_LEASE_REQUEST* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpcsvc")]
extern "system" {
    fn McastReleaseAddress(
        AddrFamily: u16,  // WORD
        pRequestID: *mut MCAST_CLIENT_UID,  // MCAST_CLIENT_UID* in/out
        pReleaseRequest: *mut MCAST_LEASE_REQUEST  // MCAST_LEASE_REQUEST* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dhcpcsvc.dll")]
public static extern uint McastReleaseAddress(ushort AddrFamily, IntPtr pRequestID, IntPtr pReleaseRequest);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dhcpcsvc_McastReleaseAddress' -Namespace Win32 -PassThru
# $api::McastReleaseAddress(AddrFamily, pRequestID, pReleaseRequest)

#uselib "dhcpcsvc.dll"
#func global McastReleaseAddress "McastReleaseAddress" sptr, sptr, sptr
; McastReleaseAddress AddrFamily, varptr(pRequestID), varptr(pReleaseRequest)   ; 戻り値は stat
; AddrFamily : WORD -> "sptr"
; pRequestID : MCAST_CLIENT_UID* in/out -> "sptr"
; pReleaseRequest : MCAST_LEASE_REQUEST* 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 "dhcpcsvc.dll"
#cfunc global McastReleaseAddress "McastReleaseAddress" int, var, var
; res = McastReleaseAddress(AddrFamily, pRequestID, pReleaseRequest)
; AddrFamily : WORD -> "int"
; pRequestID : MCAST_CLIENT_UID* in/out -> "var"
; pReleaseRequest : MCAST_LEASE_REQUEST* 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 McastReleaseAddress(WORD AddrFamily, MCAST_CLIENT_UID* pRequestID, MCAST_LEASE_REQUEST* pReleaseRequest)
#uselib "dhcpcsvc.dll"
#cfunc global McastReleaseAddress "McastReleaseAddress" int, var, var
; res = McastReleaseAddress(AddrFamily, pRequestID, pReleaseRequest)
; AddrFamily : WORD -> "int"
; pRequestID : MCAST_CLIENT_UID* in/out -> "var"
; pReleaseRequest : MCAST_LEASE_REQUEST* 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 (
	dhcpcsvc = windows.NewLazySystemDLL("dhcpcsvc.dll")
	procMcastReleaseAddress = dhcpcsvc.NewProc("McastReleaseAddress")
)

// AddrFamily (WORD), pRequestID (MCAST_CLIENT_UID* in/out), pReleaseRequest (MCAST_LEASE_REQUEST* in/out)
r1, _, err := procMcastReleaseAddress.Call(
	uintptr(AddrFamily),
	uintptr(pRequestID),
	uintptr(pReleaseRequest),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function McastReleaseAddress(
  AddrFamily: Word;   // WORD
  pRequestID: Pointer;   // MCAST_CLIENT_UID* in/out
  pReleaseRequest: Pointer   // MCAST_LEASE_REQUEST* in/out
): DWORD; stdcall;
  external 'dhcpcsvc.dll' name 'McastReleaseAddress';

result := DllCall("dhcpcsvc\McastReleaseAddress"
    , "UShort", AddrFamily   ; WORD
    , "Ptr", pRequestID   ; MCAST_CLIENT_UID* in/out
    , "Ptr", pReleaseRequest   ; MCAST_LEASE_REQUEST* in/out
    , "UInt")   ; return: DWORD

●McastReleaseAddress(AddrFamily, pRequestID, pReleaseRequest) = DLL("dhcpcsvc.dll", "dword McastReleaseAddress(int, void*, void*)")
# 呼び出し: McastReleaseAddress(AddrFamily, pRequestID, pReleaseRequest)
# AddrFamily : WORD -> "int"
# pRequestID : MCAST_CLIENT_UID* in/out -> "void*"
# pReleaseRequest : MCAST_LEASE_REQUEST* 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)。