WSAStartup

// WS2_32.dll
#include <windows.h>

INT WSAStartup(
    WORD wVersionRequested,
    WSADATA* lpWSAData
);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WSAStartup(
    wVersionRequested As UShort,   ' WORD
    lpWSAData As IntPtr   ' WSADATA* out
) As Integer
End Function

' wVersionRequested : WORD
' lpWSAData : WSADATA* out
Declare PtrSafe Function WSAStartup Lib "ws2_32" ( _
    ByVal wVersionRequested As Integer, _
    ByVal lpWSAData 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

WSAStartup = ctypes.windll.ws2_32.WSAStartup
WSAStartup.restype = ctypes.c_int
WSAStartup.argtypes = [
    ctypes.c_ushort,  # wVersionRequested : WORD
    ctypes.c_void_p,  # lpWSAData : WSADATA* out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
WSAStartup = Fiddle::Function.new(
  lib['WSAStartup'],
  [
    -Fiddle::TYPE_SHORT,  # wVersionRequested : WORD
    Fiddle::TYPE_VOIDP,  # lpWSAData : WSADATA* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn WSAStartup(
        wVersionRequested: u16,  // WORD
        lpWSAData: *mut WSADATA  // WSADATA* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int WSAStartup(ushort wVersionRequested, IntPtr lpWSAData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_WSAStartup' -Namespace Win32 -PassThru
# $api::WSAStartup(wVersionRequested, lpWSAData)

#uselib "WS2_32.dll"
#func global WSAStartup "WSAStartup" sptr, sptr
; WSAStartup wVersionRequested, varptr(lpWSAData)   ; 戻り値は stat
; wVersionRequested : WORD -> "sptr"
; lpWSAData : WSADATA* 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 (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procWSAStartup = ws2_32.NewProc("WSAStartup")
)

// wVersionRequested (WORD), lpWSAData (WSADATA* out)
r1, _, err := procWSAStartup.Call(
	uintptr(wVersionRequested),
	uintptr(lpWSAData),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function WSAStartup(
  wVersionRequested: Word;   // WORD
  lpWSAData: Pointer   // WSADATA* out
): Integer; stdcall;
  external 'WS2_32.dll' name 'WSAStartup';

result := DllCall("WS2_32\WSAStartup"
    , "UShort", wVersionRequested   ; WORD
    , "Ptr", lpWSAData   ; WSADATA* out
    , "Int")   ; return: INT

●WSAStartup(wVersionRequested, lpWSAData) = DLL("WS2_32.dll", "int WSAStartup(int, void*)")
# 呼び出し: WSAStartup(wVersionRequested, lpWSAData)
# wVersionRequested : WORD -> "int"
# lpWSAData : WSADATA* 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 "ws2_32" fn WSAStartup(
    wVersionRequested: u16, // WORD
    lpWSAData: [*c]WSADATA // WSADATA* out
) callconv(std.os.windows.WINAPI) i32;

proc WSAStartup(
    wVersionRequested: uint16,  # WORD
    lpWSAData: ptr WSADATA  # WSADATA* out
): int32 {.importc: "WSAStartup", stdcall, dynlib: "WS2_32.dll".}

pragma(lib, "ws2_32");
extern(Windows)
int WSAStartup(
    ushort wVersionRequested,   // WORD
    WSADATA* lpWSAData   // WSADATA* out
);

ccall((:WSAStartup, "WS2_32.dll"), stdcall, Int32,
      (UInt16, Ptr{WSADATA}),
      wVersionRequested, lpWSAData)
# wVersionRequested : WORD -> UInt16
# lpWSAData : WSADATA* out -> Ptr{WSADATA}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t WSAStartup(
    uint16_t wVersionRequested,
    void* lpWSAData);
]]
local ws2_32 = ffi.load("ws2_32")
-- ws2_32.WSAStartup(wVersionRequested, lpWSAData)
-- wVersionRequested : WORD
-- lpWSAData : WSADATA* 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('WS2_32.dll');
const WSAStartup = lib.func('__stdcall', 'WSAStartup', 'int32_t', ['uint16_t', 'void *']);
// WSAStartup(wVersionRequested, lpWSAData)
// wVersionRequested : WORD -> 'uint16_t'
// lpWSAData : WSADATA* out -> 'void *'
// 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("WS2_32.dll", {
  WSAStartup: { parameters: ["u16", "pointer"], result: "i32" },
});
// lib.symbols.WSAStartup(wVersionRequested, lpWSAData)
// wVersionRequested : WORD -> "u16"
// lpWSAData : WSADATA* 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
int32_t WSAStartup(
    uint16_t wVersionRequested,
    void* lpWSAData);
C, "WS2_32.dll");
// $ffi->WSAStartup(wVersionRequested, lpWSAData);
// wVersionRequested : WORD
// lpWSAData : WSADATA* 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 Ws2_32 extends StdCallLibrary {
    Ws2_32 INSTANCE = Native.load("ws2_32", Ws2_32.class);
    int WSAStartup(
        short wVersionRequested,   // WORD
        Pointer lpWSAData   // WSADATA* out
    );
}

@[Link("ws2_32")]
lib LibWS2_32
  fun WSAStartup = WSAStartup(
    wVersionRequested : UInt16,   # WORD
    lpWSAData : WSADATA*   # WSADATA* out
  ) : Int32
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 WSAStartupNative = Int32 Function(Uint16, Pointer<Void>);
typedef WSAStartupDart = int Function(int, Pointer<Void>);
final WSAStartup = DynamicLibrary.open('WS2_32.dll')
    .lookupFunction<WSAStartupNative, WSAStartupDart>('WSAStartup');
// wVersionRequested : WORD -> Uint16
// lpWSAData : WSADATA* out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WSAStartup(
  wVersionRequested: Word;   // WORD
  lpWSAData: Pointer   // WSADATA* out
): Integer; stdcall;
  external 'WS2_32.dll' name 'WSAStartup';

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

foreign import stdcall safe "WSAStartup"
  c_WSAStartup :: Word16 -> Ptr () -> IO Int32
-- wVersionRequested : WORD -> Word16
-- lpWSAData : WSADATA* out -> Ptr ()
-- 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 wsastartup =
  foreign "WSAStartup"
    (uint16_t @-> (ptr void) @-> returning int32_t)
(* wVersionRequested : WORD -> uint16_t *)
(* lpWSAData : WSADATA* out -> (ptr void) *)
(* 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 ws2_32 (t "WS2_32.dll"))
(cffi:use-foreign-library ws2_32)

(cffi:defcfun ("WSAStartup" wsastartup :convention :stdcall) :int32
  (w-version-requested :uint16)   ; WORD
  (lp-wsadata :pointer))   ; WSADATA* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WSAStartup = Win32::API::More->new('WS2_32',
    'int WSAStartup(WORD wVersionRequested, LPVOID lpWSAData)');
# my $ret = $WSAStartup->Call($wVersionRequested, $lpWSAData);
# wVersionRequested : WORD -> WORD
# lpWSAData : WSADATA* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。