NetApiBufferSize

// NETAPI32.dll
#include <windows.h>

DWORD NetApiBufferSize(
    void* Buffer,
    DWORD* ByteCount
);

<DllImport("NETAPI32.dll", ExactSpelling:=True)>
Public Shared Function NetApiBufferSize(
    Buffer As IntPtr,   ' void*
    <Out> ByRef ByteCount As UInteger   ' DWORD* out
) As UInteger
End Function

' Buffer : void*
' ByteCount : DWORD* out
Declare PtrSafe Function NetApiBufferSize Lib "netapi32" ( _
    ByVal Buffer As LongPtr, _
    ByRef ByteCount 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

NetApiBufferSize = ctypes.windll.netapi32.NetApiBufferSize
NetApiBufferSize.restype = wintypes.DWORD
NetApiBufferSize.argtypes = [
    ctypes.POINTER(None),  # Buffer : void*
    ctypes.POINTER(wintypes.DWORD),  # ByteCount : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NETAPI32.dll')
NetApiBufferSize = Fiddle::Function.new(
  lib['NetApiBufferSize'],
  [
    Fiddle::TYPE_VOIDP,  # Buffer : void*
    Fiddle::TYPE_VOIDP,  # ByteCount : DWORD* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "netapi32")]
extern "system" {
    fn NetApiBufferSize(
        Buffer: *mut (),  // void*
        ByteCount: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NETAPI32.dll")]
public static extern uint NetApiBufferSize(IntPtr Buffer, out uint ByteCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NETAPI32_NetApiBufferSize' -Namespace Win32 -PassThru
# $api::NetApiBufferSize(Buffer, ByteCount)

#uselib "NETAPI32.dll"
#func global NetApiBufferSize "NetApiBufferSize" sptr, sptr
; NetApiBufferSize Buffer, varptr(ByteCount)   ; 戻り値は stat
; Buffer : void* -> "sptr"
; ByteCount : DWORD* 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。

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

var (
	netapi32 = windows.NewLazySystemDLL("NETAPI32.dll")
	procNetApiBufferSize = netapi32.NewProc("NetApiBufferSize")
)

// Buffer (void*), ByteCount (DWORD* out)
r1, _, err := procNetApiBufferSize.Call(
	uintptr(Buffer),
	uintptr(ByteCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function NetApiBufferSize(
  Buffer: Pointer;   // void*
  ByteCount: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'NetApiBufferSize';

result := DllCall("NETAPI32\NetApiBufferSize"
    , "Ptr", Buffer   ; void*
    , "Ptr", ByteCount   ; DWORD* out
    , "UInt")   ; return: DWORD

●NetApiBufferSize(Buffer, ByteCount) = DLL("NETAPI32.dll", "dword NetApiBufferSize(void*, void*)")
# 呼び出し: NetApiBufferSize(Buffer, ByteCount)
# Buffer : void* -> "void*"
# ByteCount : DWORD* 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)。

const std = @import("std");

extern "netapi32" fn NetApiBufferSize(
    Buffer: ?*anyopaque, // void*
    ByteCount: [*c]u32 // DWORD* out
) callconv(std.os.windows.WINAPI) u32;

proc NetApiBufferSize(
    Buffer: pointer,  # void*
    ByteCount: ptr uint32  # DWORD* out
): uint32 {.importc: "NetApiBufferSize", stdcall, dynlib: "NETAPI32.dll".}

pragma(lib, "netapi32");
extern(Windows)
uint NetApiBufferSize(
    void* Buffer,   // void*
    uint* ByteCount   // DWORD* out
);

ccall((:NetApiBufferSize, "NETAPI32.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, Ptr{UInt32}),
      Buffer, ByteCount)
# Buffer : void* -> Ptr{Cvoid}
# ByteCount : DWORD* out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t NetApiBufferSize(
    void* Buffer,
    uint32_t* ByteCount);
]]
local netapi32 = ffi.load("netapi32")
-- netapi32.NetApiBufferSize(Buffer, ByteCount)
-- Buffer : void*
-- ByteCount : DWORD* out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('NETAPI32.dll');
const NetApiBufferSize = lib.func('__stdcall', 'NetApiBufferSize', 'uint32_t', ['void *', 'uint32_t *']);
// NetApiBufferSize(Buffer, ByteCount)
// Buffer : void* -> 'void *'
// ByteCount : DWORD* out -> 'uint32_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("NETAPI32.dll", {
  NetApiBufferSize: { parameters: ["pointer", "pointer"], result: "u32" },
});
// lib.symbols.NetApiBufferSize(Buffer, ByteCount)
// Buffer : void* -> "pointer"
// ByteCount : DWORD* out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t NetApiBufferSize(
    void* Buffer,
    uint32_t* ByteCount);
C, "NETAPI32.dll");
// $ffi->NetApiBufferSize(Buffer, ByteCount);
// Buffer : void*
// ByteCount : DWORD* out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Netapi32 extends StdCallLibrary {
    Netapi32 INSTANCE = Native.load("netapi32", Netapi32.class);
    int NetApiBufferSize(
        Pointer Buffer,   // void*
        IntByReference ByteCount   // DWORD* out
    );
}

@[Link("netapi32")]
lib LibNETAPI32
  fun NetApiBufferSize = NetApiBufferSize(
    Buffer : Void*,   # void*
    ByteCount : UInt32*   # DWORD* out
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef NetApiBufferSizeNative = Uint32 Function(Pointer<Void>, Pointer<Uint32>);
typedef NetApiBufferSizeDart = int Function(Pointer<Void>, Pointer<Uint32>);
final NetApiBufferSize = DynamicLibrary.open('NETAPI32.dll')
    .lookupFunction<NetApiBufferSizeNative, NetApiBufferSizeDart>('NetApiBufferSize');
// Buffer : void* -> Pointer<Void>
// ByteCount : DWORD* out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function NetApiBufferSize(
  Buffer: Pointer;   // void*
  ByteCount: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'NetApiBufferSize';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "NetApiBufferSize"
  c_NetApiBufferSize :: Ptr () -> Ptr Word32 -> IO Word32
-- Buffer : void* -> Ptr ()
-- ByteCount : DWORD* out -> Ptr Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let netapibuffersize =
  foreign "NetApiBufferSize"
    ((ptr void) @-> (ptr uint32_t) @-> returning uint32_t)
(* Buffer : void* -> (ptr void) *)
(* ByteCount : DWORD* out -> (ptr uint32_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library netapi32 (t "NETAPI32.dll"))
(cffi:use-foreign-library netapi32)

(cffi:defcfun ("NetApiBufferSize" net-api-buffer-size :convention :stdcall) :uint32
  (buffer :pointer)   ; void*
  (byte-count :pointer))   ; DWORD* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $NetApiBufferSize = Win32::API::More->new('NETAPI32',
    'DWORD NetApiBufferSize(LPVOID Buffer, LPVOID ByteCount)');
# my $ret = $NetApiBufferSize->Call($Buffer, $ByteCount);
# Buffer : void* -> LPVOID
# ByteCount : DWORD* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。