McastEnumerateScopes

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

DWORD McastEnumerateScopes(
    WORD AddrFamily,
    BOOL ReQuery,
    MCAST_SCOPE_ENTRY* pScopeList,
    DWORD* pScopeLen,
    DWORD* pScopeCount
);

<DllImport("dhcpcsvc.dll", ExactSpelling:=True)>
Public Shared Function McastEnumerateScopes(
    AddrFamily As UShort,   ' WORD
    ReQuery As Boolean,   ' BOOL
    pScopeList As IntPtr,   ' MCAST_SCOPE_ENTRY* in/out
    ByRef pScopeLen As UInteger,   ' DWORD* in/out
    ByRef pScopeCount As UInteger   ' DWORD* in/out
) As UInteger
End Function

' AddrFamily : WORD
' ReQuery : BOOL
' pScopeList : MCAST_SCOPE_ENTRY* in/out
' pScopeLen : DWORD* in/out
' pScopeCount : DWORD* in/out
Declare PtrSafe Function McastEnumerateScopes Lib "dhcpcsvc" ( _
    ByVal AddrFamily As Integer, _
    ByVal ReQuery As Long, _
    ByVal pScopeList As LongPtr, _
    ByRef pScopeLen As Long, _
    ByRef pScopeCount As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

McastEnumerateScopes = ctypes.windll.dhcpcsvc.McastEnumerateScopes
McastEnumerateScopes.restype = wintypes.DWORD
McastEnumerateScopes.argtypes = [
    ctypes.c_ushort,  # AddrFamily : WORD
    wintypes.BOOL,  # ReQuery : BOOL
    ctypes.c_void_p,  # pScopeList : MCAST_SCOPE_ENTRY* in/out
    ctypes.POINTER(wintypes.DWORD),  # pScopeLen : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # pScopeCount : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dhcpcsvc.dll')
McastEnumerateScopes = Fiddle::Function.new(
  lib['McastEnumerateScopes'],
  [
    -Fiddle::TYPE_SHORT,  # AddrFamily : WORD
    Fiddle::TYPE_INT,  # ReQuery : BOOL
    Fiddle::TYPE_VOIDP,  # pScopeList : MCAST_SCOPE_ENTRY* in/out
    Fiddle::TYPE_VOIDP,  # pScopeLen : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # pScopeCount : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpcsvc")]
extern "system" {
    fn McastEnumerateScopes(
        AddrFamily: u16,  // WORD
        ReQuery: i32,  // BOOL
        pScopeList: *mut MCAST_SCOPE_ENTRY,  // MCAST_SCOPE_ENTRY* in/out
        pScopeLen: *mut u32,  // DWORD* in/out
        pScopeCount: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dhcpcsvc.dll")]
public static extern uint McastEnumerateScopes(ushort AddrFamily, bool ReQuery, IntPtr pScopeList, ref uint pScopeLen, ref uint pScopeCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dhcpcsvc_McastEnumerateScopes' -Namespace Win32 -PassThru
# $api::McastEnumerateScopes(AddrFamily, ReQuery, pScopeList, pScopeLen, pScopeCount)

#uselib "dhcpcsvc.dll"
#func global McastEnumerateScopes "McastEnumerateScopes" sptr, sptr, sptr, sptr, sptr
; McastEnumerateScopes AddrFamily, ReQuery, varptr(pScopeList), varptr(pScopeLen), varptr(pScopeCount)   ; 戻り値は stat
; AddrFamily : WORD -> "sptr"
; ReQuery : BOOL -> "sptr"
; pScopeList : MCAST_SCOPE_ENTRY* in/out -> "sptr"
; pScopeLen : DWORD* in/out -> "sptr"
; pScopeCount : DWORD* 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 McastEnumerateScopes "McastEnumerateScopes" int, int, var, var, var
; res = McastEnumerateScopes(AddrFamily, ReQuery, pScopeList, pScopeLen, pScopeCount)
; AddrFamily : WORD -> "int"
; ReQuery : BOOL -> "int"
; pScopeList : MCAST_SCOPE_ENTRY* in/out -> "var"
; pScopeLen : DWORD* in/out -> "var"
; pScopeCount : DWORD* 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 McastEnumerateScopes(WORD AddrFamily, BOOL ReQuery, MCAST_SCOPE_ENTRY* pScopeList, DWORD* pScopeLen, DWORD* pScopeCount)
#uselib "dhcpcsvc.dll"
#cfunc global McastEnumerateScopes "McastEnumerateScopes" int, int, var, var, var
; res = McastEnumerateScopes(AddrFamily, ReQuery, pScopeList, pScopeLen, pScopeCount)
; AddrFamily : WORD -> "int"
; ReQuery : BOOL -> "int"
; pScopeList : MCAST_SCOPE_ENTRY* in/out -> "var"
; pScopeLen : DWORD* in/out -> "var"
; pScopeCount : DWORD* 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")
	procMcastEnumerateScopes = dhcpcsvc.NewProc("McastEnumerateScopes")
)

// AddrFamily (WORD), ReQuery (BOOL), pScopeList (MCAST_SCOPE_ENTRY* in/out), pScopeLen (DWORD* in/out), pScopeCount (DWORD* in/out)
r1, _, err := procMcastEnumerateScopes.Call(
	uintptr(AddrFamily),
	uintptr(ReQuery),
	uintptr(pScopeList),
	uintptr(pScopeLen),
	uintptr(pScopeCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function McastEnumerateScopes(
  AddrFamily: Word;   // WORD
  ReQuery: BOOL;   // BOOL
  pScopeList: Pointer;   // MCAST_SCOPE_ENTRY* in/out
  pScopeLen: Pointer;   // DWORD* in/out
  pScopeCount: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'dhcpcsvc.dll' name 'McastEnumerateScopes';

result := DllCall("dhcpcsvc\McastEnumerateScopes"
    , "UShort", AddrFamily   ; WORD
    , "Int", ReQuery   ; BOOL
    , "Ptr", pScopeList   ; MCAST_SCOPE_ENTRY* in/out
    , "Ptr", pScopeLen   ; DWORD* in/out
    , "Ptr", pScopeCount   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●McastEnumerateScopes(AddrFamily, ReQuery, pScopeList, pScopeLen, pScopeCount) = DLL("dhcpcsvc.dll", "dword McastEnumerateScopes(int, bool, void*, void*, void*)")
# 呼び出し: McastEnumerateScopes(AddrFamily, ReQuery, pScopeList, pScopeLen, pScopeCount)
# AddrFamily : WORD -> "int"
# ReQuery : BOOL -> "bool"
# pScopeList : MCAST_SCOPE_ENTRY* in/out -> "void*"
# pScopeLen : DWORD* in/out -> "void*"
# pScopeCount : DWORD* 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)。