HttpInitialize

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

DWORD HttpInitialize(
    HTTPAPI_VERSION Version,
    HTTP_INITIALIZE Flags,
    void* pReserved   // optional
);

<DllImport("HTTPAPI.dll", ExactSpelling:=True)>
Public Shared Function HttpInitialize(
    Version As HTTPAPI_VERSION,   ' HTTPAPI_VERSION
    Flags As UInteger,   ' HTTP_INITIALIZE
    pReserved As IntPtr   ' void* optional, in/out
) As UInteger
End Function

' Version : HTTPAPI_VERSION
' Flags : HTTP_INITIALIZE
' pReserved : void* optional, in/out
Declare PtrSafe Function HttpInitialize Lib "httpapi" ( _
    ByVal Version As LongPtr, _
    ByVal Flags As Long, _
    ByVal pReserved 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

HttpInitialize = ctypes.windll.httpapi.HttpInitialize
HttpInitialize.restype = wintypes.DWORD
HttpInitialize.argtypes = [
    HTTPAPI_VERSION,  # Version : HTTPAPI_VERSION
    wintypes.DWORD,  # Flags : HTTP_INITIALIZE
    ctypes.POINTER(None),  # pReserved : void* optional, in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('HTTPAPI.dll')
HttpInitialize = Fiddle::Function.new(
  lib['HttpInitialize'],
  [
    Fiddle::TYPE_VOIDP,  # Version : HTTPAPI_VERSION
    -Fiddle::TYPE_INT,  # Flags : HTTP_INITIALIZE
    Fiddle::TYPE_VOIDP,  # pReserved : void* optional, in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "httpapi")]
extern "system" {
    fn HttpInitialize(
        Version: HTTPAPI_VERSION,  // HTTPAPI_VERSION
        Flags: u32,  // HTTP_INITIALIZE
        pReserved: *mut ()  // void* optional, in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("HTTPAPI.dll")]
public static extern uint HttpInitialize(HTTPAPI_VERSION Version, uint Flags, IntPtr pReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'HTTPAPI_HttpInitialize' -Namespace Win32 -PassThru
# $api::HttpInitialize(Version, Flags, pReserved)

#uselib "HTTPAPI.dll"
#func global HttpInitialize "HttpInitialize" sptr, sptr, sptr
; HttpInitialize Version, Flags, pReserved   ; 戻り値は stat
; Version : HTTPAPI_VERSION -> "sptr"
; Flags : HTTP_INITIALIZE -> "sptr"
; pReserved : void* optional, in/out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 "HTTPAPI.dll"
#cfunc global HttpInitialize "HttpInitialize" int, int, sptr
; res = HttpInitialize(Version, Flags, pReserved)
; Version : HTTPAPI_VERSION -> "int"
; Flags : HTTP_INITIALIZE -> "int"
; pReserved : void* optional, in/out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。

; DWORD HttpInitialize(HTTPAPI_VERSION Version, HTTP_INITIALIZE Flags, void* pReserved)
#uselib "HTTPAPI.dll"
#cfunc global HttpInitialize "HttpInitialize" int, int, intptr
; res = HttpInitialize(Version, Flags, pReserved)
; Version : HTTPAPI_VERSION -> "int"
; Flags : HTTP_INITIALIZE -> "int"
; pReserved : void* optional, in/out -> "intptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。

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

var (
	httpapi = windows.NewLazySystemDLL("HTTPAPI.dll")
	procHttpInitialize = httpapi.NewProc("HttpInitialize")
)

// Version (HTTPAPI_VERSION), Flags (HTTP_INITIALIZE), pReserved (void* optional, in/out)
r1, _, err := procHttpInitialize.Call(
	uintptr(Version),
	uintptr(Flags),
	uintptr(pReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function HttpInitialize(
  Version: HTTPAPI_VERSION;   // HTTPAPI_VERSION
  Flags: DWORD;   // HTTP_INITIALIZE
  pReserved: Pointer   // void* optional, in/out
): DWORD; stdcall;
  external 'HTTPAPI.dll' name 'HttpInitialize';

result := DllCall("HTTPAPI\HttpInitialize"
    , "Ptr", Version   ; HTTPAPI_VERSION
    , "UInt", Flags   ; HTTP_INITIALIZE
    , "Ptr", pReserved   ; void* optional, in/out
    , "UInt")   ; return: DWORD

●HttpInitialize(Version, Flags, pReserved) = DLL("HTTPAPI.dll", "dword HttpInitialize(void*, dword, void*)")
# 呼び出し: HttpInitialize(Version, Flags, pReserved)
# Version : HTTPAPI_VERSION -> "void*"
# Flags : HTTP_INITIALIZE -> "dword"
# pReserved : void* optional, 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)。

const std = @import("std");

extern "httpapi" fn HttpInitialize(
    Version: HTTPAPI_VERSION, // HTTPAPI_VERSION
    Flags: u32, // HTTP_INITIALIZE
    pReserved: ?*anyopaque // void* optional, in/out
) callconv(std.os.windows.WINAPI) u32;

proc HttpInitialize(
    Version: HTTPAPI_VERSION,  # HTTPAPI_VERSION
    Flags: uint32,  # HTTP_INITIALIZE
    pReserved: pointer  # void* optional, in/out
): uint32 {.importc: "HttpInitialize", stdcall, dynlib: "HTTPAPI.dll".}

pragma(lib, "httpapi");
extern(Windows)
uint HttpInitialize(
    HTTPAPI_VERSION Version,   // HTTPAPI_VERSION
    uint Flags,   // HTTP_INITIALIZE
    void* pReserved   // void* optional, in/out
);

ccall((:HttpInitialize, "HTTPAPI.dll"), stdcall, UInt32,
      (HTTPAPI_VERSION, UInt32, Ptr{Cvoid}),
      Version, Flags, pReserved)
# Version : HTTPAPI_VERSION -> HTTPAPI_VERSION
# Flags : HTTP_INITIALIZE -> UInt32
# pReserved : void* optional, in/out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t HttpInitialize(
    HTTPAPI_VERSION Version,
    uint32_t Flags,
    void* pReserved);
]]
local httpapi = ffi.load("httpapi")
-- httpapi.HttpInitialize(Version, Flags, pReserved)
-- Version : HTTPAPI_VERSION
-- Flags : HTTP_INITIALIZE
-- pReserved : void* optional, in/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('HTTPAPI.dll');
const HttpInitialize = lib.func('__stdcall', 'HttpInitialize', 'uint32_t', ['HTTPAPI_VERSION', 'uint32_t', 'void *']);
// HttpInitialize(Version, Flags, pReserved)
// Version : HTTPAPI_VERSION -> 'HTTPAPI_VERSION'
// Flags : HTTP_INITIALIZE -> 'uint32_t'
// pReserved : void* optional, in/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("HTTPAPI.dll", {
  HttpInitialize: { parameters: ["buffer", "u32", "pointer"], result: "u32" },
});
// lib.symbols.HttpInitialize(Version, Flags, pReserved)
// Version : HTTPAPI_VERSION -> "buffer"
// Flags : HTTP_INITIALIZE -> "u32"
// pReserved : void* optional, in/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 HttpInitialize(
    HTTPAPI_VERSION Version,
    uint32_t Flags,
    void* pReserved);
C, "HTTPAPI.dll");
// $ffi->HttpInitialize(Version, Flags, pReserved);
// Version : HTTPAPI_VERSION
// Flags : HTTP_INITIALIZE
// pReserved : void* optional, in/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 Httpapi extends StdCallLibrary {
    Httpapi INSTANCE = Native.load("httpapi", Httpapi.class);
    int HttpInitialize(
        HTTPAPI_VERSION /* extends Structure (by value) */ Version,   // HTTPAPI_VERSION
        int Flags,   // HTTP_INITIALIZE
        Pointer pReserved   // void* optional, in/out
    );
}

@[Link("httpapi")]
lib LibHTTPAPI
  fun HttpInitialize = HttpInitialize(
    Version : HTTPAPI_VERSION,   # HTTPAPI_VERSION
    Flags : UInt32,   # HTTP_INITIALIZE
    pReserved : Void*   # void* optional, in/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 HttpInitializeNative = Uint32 Function(HTTPAPI_VERSION, Uint32, Pointer<Void>);
typedef HttpInitializeDart = int Function(int, int, Pointer<Void>);
final HttpInitialize = DynamicLibrary.open('HTTPAPI.dll')
    .lookupFunction<HttpInitializeNative, HttpInitializeDart>('HttpInitialize');
// Version : HTTPAPI_VERSION -> HTTPAPI_VERSION
// Flags : HTTP_INITIALIZE -> Uint32
// pReserved : void* optional, in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function HttpInitialize(
  Version: HTTPAPI_VERSION;   // HTTPAPI_VERSION
  Flags: DWORD;   // HTTP_INITIALIZE
  pReserved: Pointer   // void* optional, in/out
): DWORD; stdcall;
  external 'HTTPAPI.dll' name 'HttpInitialize';

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

foreign import stdcall safe "HttpInitialize"
  c_HttpInitialize :: HTTPAPI_VERSION -> Word32 -> Ptr () -> IO Word32
-- Version : HTTPAPI_VERSION -> HTTPAPI_VERSION
-- Flags : HTTP_INITIALIZE -> Word32
-- pReserved : void* optional, in/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。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let httpinitialize =
  foreign "HttpInitialize"
    (HTTPAPI_VERSION @-> uint32_t @-> (ptr void) @-> returning uint32_t)
(* Version : HTTPAPI_VERSION -> HTTPAPI_VERSION *)
(* Flags : HTTP_INITIALIZE -> uint32_t *)
(* pReserved : void* optional, in/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 httpapi (t "HTTPAPI.dll"))
(cffi:use-foreign-library httpapi)

(cffi:defcfun ("HttpInitialize" http-initialize :convention :stdcall) :uint32
  (version (:struct httpapi-version))   ; HTTPAPI_VERSION
  (flags :uint32)   ; HTTP_INITIALIZE
  (p-reserved :pointer))   ; void* optional, in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $HttpInitialize = Win32::API::More->new('HTTPAPI',
    'DWORD HttpInitialize(LPVOID Version, DWORD Flags, LPVOID pReserved)');
# my $ret = $HttpInitialize->Call($Version, $Flags, $pReserved);
# Version : HTTPAPI_VERSION -> LPVOID
# Flags : HTTP_INITIALIZE -> DWORD
# pReserved : void* optional, in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。