RasEnumConnectionsA

// RASAPI32.dll  (ANSI / -A)
#include <windows.h>

DWORD RasEnumConnectionsA(
    RASCONNA* param0,   // optional
    DWORD* param1,
    DWORD* param2
);

<DllImport("RASAPI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function RasEnumConnectionsA(
    param0 As IntPtr,   ' RASCONNA* optional, in/out
    ByRef param1 As UInteger,   ' DWORD* in/out
    <Out> ByRef param2 As UInteger   ' DWORD* out
) As UInteger
End Function

' param0 : RASCONNA* optional, in/out
' param1 : DWORD* in/out
' param2 : DWORD* out
Declare PtrSafe Function RasEnumConnectionsA Lib "rasapi32" ( _
    ByVal param0 As LongPtr, _
    ByRef param1 As Long, _
    ByRef param2 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

RasEnumConnectionsA = ctypes.windll.rasapi32.RasEnumConnectionsA
RasEnumConnectionsA.restype = wintypes.DWORD
RasEnumConnectionsA.argtypes = [
    ctypes.c_void_p,  # param0 : RASCONNA* optional, in/out
    ctypes.POINTER(wintypes.DWORD),  # param1 : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # param2 : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('RASAPI32.dll')
RasEnumConnectionsA = Fiddle::Function.new(
  lib['RasEnumConnectionsA'],
  [
    Fiddle::TYPE_VOIDP,  # param0 : RASCONNA* optional, in/out
    Fiddle::TYPE_VOIDP,  # param1 : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # param2 : DWORD* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "rasapi32")]
extern "system" {
    fn RasEnumConnectionsA(
        param0: *mut RASCONNA,  // RASCONNA* optional, in/out
        param1: *mut u32,  // DWORD* in/out
        param2: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("RASAPI32.dll", CharSet = CharSet.Ansi)]
public static extern uint RasEnumConnectionsA(IntPtr param0, ref uint param1, out uint param2);
"@
$api = Add-Type -MemberDefinition $sig -Name 'RASAPI32_RasEnumConnectionsA' -Namespace Win32 -PassThru
# $api::RasEnumConnectionsA(param0, param1, param2)

#uselib "RASAPI32.dll"
#func global RasEnumConnectionsA "RasEnumConnectionsA" sptr, sptr, sptr
; RasEnumConnectionsA varptr(param0), varptr(param1), varptr(param2)   ; 戻り値は stat
; param0 : RASCONNA* optional, in/out -> "sptr"
; param1 : DWORD* in/out -> "sptr"
; param2 : 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 (
	rasapi32 = windows.NewLazySystemDLL("RASAPI32.dll")
	procRasEnumConnectionsA = rasapi32.NewProc("RasEnumConnectionsA")
)

// param0 (RASCONNA* optional, in/out), param1 (DWORD* in/out), param2 (DWORD* out)
r1, _, err := procRasEnumConnectionsA.Call(
	uintptr(param0),
	uintptr(param1),
	uintptr(param2),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function RasEnumConnectionsA(
  param0: Pointer;   // RASCONNA* optional, in/out
  param1: Pointer;   // DWORD* in/out
  param2: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'RASAPI32.dll' name 'RasEnumConnectionsA';

result := DllCall("RASAPI32\RasEnumConnectionsA"
    , "Ptr", param0   ; RASCONNA* optional, in/out
    , "Ptr", param1   ; DWORD* in/out
    , "Ptr", param2   ; DWORD* out
    , "UInt")   ; return: DWORD

●RasEnumConnectionsA(param0, param1, param2) = DLL("RASAPI32.dll", "dword RasEnumConnectionsA(void*, void*, void*)")
# 呼び出し: RasEnumConnectionsA(param0, param1, param2)
# param0 : RASCONNA* optional, in/out -> "void*"
# param1 : DWORD* in/out -> "void*"
# param2 : 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 "rasapi32" fn RasEnumConnectionsA(
    param0: [*c]RASCONNA, // RASCONNA* optional, in/out
    param1: [*c]u32, // DWORD* in/out
    param2: [*c]u32 // DWORD* out
) callconv(std.os.windows.WINAPI) u32;

proc RasEnumConnectionsA(
    param0: ptr RASCONNA,  # RASCONNA* optional, in/out
    param1: ptr uint32,  # DWORD* in/out
    param2: ptr uint32  # DWORD* out
): uint32 {.importc: "RasEnumConnectionsA", stdcall, dynlib: "RASAPI32.dll".}

pragma(lib, "rasapi32");
extern(Windows)
uint RasEnumConnectionsA(
    RASCONNA* param0,   // RASCONNA* optional, in/out
    uint* param1,   // DWORD* in/out
    uint* param2   // DWORD* out
);

ccall((:RasEnumConnectionsA, "RASAPI32.dll"), stdcall, UInt32,
      (Ptr{RASCONNA}, Ptr{UInt32}, Ptr{UInt32}),
      param0, param1, param2)
# param0 : RASCONNA* optional, in/out -> Ptr{RASCONNA}
# param1 : DWORD* in/out -> Ptr{UInt32}
# param2 : 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 RasEnumConnectionsA(
    void* param0,
    uint32_t* param1,
    uint32_t* param2);
]]
local rasapi32 = ffi.load("rasapi32")
-- rasapi32.RasEnumConnectionsA(param0, param1, param2)
-- param0 : RASCONNA* optional, in/out
-- param1 : DWORD* in/out
-- param2 : 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('RASAPI32.dll');
const RasEnumConnectionsA = lib.func('__stdcall', 'RasEnumConnectionsA', 'uint32_t', ['void *', 'uint32_t *', 'uint32_t *']);
// RasEnumConnectionsA(param0, param1, param2)
// param0 : RASCONNA* optional, in/out -> 'void *'
// param1 : DWORD* in/out -> 'uint32_t *'
// param2 : 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("RASAPI32.dll", {
  RasEnumConnectionsA: { parameters: ["pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.RasEnumConnectionsA(param0, param1, param2)
// param0 : RASCONNA* optional, in/out -> "pointer"
// param1 : DWORD* in/out -> "pointer"
// param2 : DWORD* out -> "pointer"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t RasEnumConnectionsA(
    void* param0,
    uint32_t* param1,
    uint32_t* param2);
C, "RASAPI32.dll");
// $ffi->RasEnumConnectionsA(param0, param1, param2);
// param0 : RASCONNA* optional, in/out
// param1 : DWORD* in/out
// param2 : 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 Rasapi32 extends StdCallLibrary {
    Rasapi32 INSTANCE = Native.load("rasapi32", Rasapi32.class, W32APIOptions.ASCII_OPTIONS);
    int RasEnumConnectionsA(
        Pointer param0,   // RASCONNA* optional, in/out
        IntByReference param1,   // DWORD* in/out
        IntByReference param2   // DWORD* out
    );
}

@[Link("rasapi32")]
lib LibRASAPI32
  fun RasEnumConnectionsA = RasEnumConnectionsA(
    param0 : RASCONNA*,   # RASCONNA* optional, in/out
    param1 : UInt32*,   # DWORD* in/out
    param2 : 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 RasEnumConnectionsANative = Uint32 Function(Pointer<Void>, Pointer<Uint32>, Pointer<Uint32>);
typedef RasEnumConnectionsADart = int Function(Pointer<Void>, Pointer<Uint32>, Pointer<Uint32>);
final RasEnumConnectionsA = DynamicLibrary.open('RASAPI32.dll')
    .lookupFunction<RasEnumConnectionsANative, RasEnumConnectionsADart>('RasEnumConnectionsA');
// param0 : RASCONNA* optional, in/out -> Pointer<Void>
// param1 : DWORD* in/out -> Pointer<Uint32>
// param2 : DWORD* out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function RasEnumConnectionsA(
  param0: Pointer;   // RASCONNA* optional, in/out
  param1: Pointer;   // DWORD* in/out
  param2: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'RASAPI32.dll' name 'RasEnumConnectionsA';

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

foreign import stdcall safe "RasEnumConnectionsA"
  c_RasEnumConnectionsA :: Ptr () -> Ptr Word32 -> Ptr Word32 -> IO Word32
-- param0 : RASCONNA* optional, in/out -> Ptr ()
-- param1 : DWORD* in/out -> Ptr Word32
-- param2 : 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 rasenumconnectionsa =
  foreign "RasEnumConnectionsA"
    ((ptr void) @-> (ptr uint32_t) @-> (ptr uint32_t) @-> returning uint32_t)
(* param0 : RASCONNA* optional, in/out -> (ptr void) *)
(* param1 : DWORD* in/out -> (ptr uint32_t) *)
(* param2 : 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 rasapi32 (t "RASAPI32.dll"))
(cffi:use-foreign-library rasapi32)

(cffi:defcfun ("RasEnumConnectionsA" ras-enum-connections-a :convention :stdcall) :uint32
  (param0 :pointer)   ; RASCONNA* optional, in/out
  (param1 :pointer)   ; DWORD* in/out
  (param2 :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 $RasEnumConnectionsA = Win32::API::More->new('RASAPI32',
    'DWORD RasEnumConnectionsA(LPVOID param0, LPVOID param1, LPVOID param2)');
# my $ret = $RasEnumConnectionsA->Call($param0, $param1, $param2);
# param0 : RASCONNA* optional, in/out -> LPVOID
# param1 : DWORD* in/out -> LPVOID
# param2 : 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。