WinHttpOpen

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

void* WinHttpOpen(
    LPCWSTR pszAgentW,   // optional
    WINHTTP_ACCESS_TYPE dwAccessType,
    LPCWSTR pszProxyW,   // optional
    LPCWSTR pszProxyBypassW,   // optional
    DWORD dwFlags
);

<DllImport("WINHTTP.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WinHttpOpen(
    <MarshalAs(UnmanagedType.LPWStr)> pszAgentW As String,   ' LPCWSTR optional
    dwAccessType As UInteger,   ' WINHTTP_ACCESS_TYPE
    <MarshalAs(UnmanagedType.LPWStr)> pszProxyW As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> pszProxyBypassW As String,   ' LPCWSTR optional
    dwFlags As UInteger   ' DWORD
) As IntPtr
End Function

' pszAgentW : LPCWSTR optional
' dwAccessType : WINHTTP_ACCESS_TYPE
' pszProxyW : LPCWSTR optional
' pszProxyBypassW : LPCWSTR optional
' dwFlags : DWORD
Declare PtrSafe Function WinHttpOpen Lib "winhttp" ( _
    ByVal pszAgentW As LongPtr, _
    ByVal dwAccessType As Long, _
    ByVal pszProxyW As LongPtr, _
    ByVal pszProxyBypassW As LongPtr, _
    ByVal dwFlags As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

WinHttpOpen = ctypes.windll.winhttp.WinHttpOpen
WinHttpOpen.restype = ctypes.c_void_p
WinHttpOpen.argtypes = [
    wintypes.LPCWSTR,  # pszAgentW : LPCWSTR optional
    wintypes.DWORD,  # dwAccessType : WINHTTP_ACCESS_TYPE
    wintypes.LPCWSTR,  # pszProxyW : LPCWSTR optional
    wintypes.LPCWSTR,  # pszProxyBypassW : LPCWSTR optional
    wintypes.DWORD,  # dwFlags : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINHTTP.dll')
WinHttpOpen = Fiddle::Function.new(
  lib['WinHttpOpen'],
  [
    Fiddle::TYPE_VOIDP,  # pszAgentW : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwAccessType : WINHTTP_ACCESS_TYPE
    Fiddle::TYPE_VOIDP,  # pszProxyW : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pszProxyBypassW : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "winhttp")]
extern "system" {
    fn WinHttpOpen(
        pszAgentW: *const u16,  // LPCWSTR optional
        dwAccessType: u32,  // WINHTTP_ACCESS_TYPE
        pszProxyW: *const u16,  // LPCWSTR optional
        pszProxyBypassW: *const u16,  // LPCWSTR optional
        dwFlags: u32  // DWORD
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WINHTTP.dll", SetLastError = true)]
public static extern IntPtr WinHttpOpen([MarshalAs(UnmanagedType.LPWStr)] string pszAgentW, uint dwAccessType, [MarshalAs(UnmanagedType.LPWStr)] string pszProxyW, [MarshalAs(UnmanagedType.LPWStr)] string pszProxyBypassW, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINHTTP_WinHttpOpen' -Namespace Win32 -PassThru
# $api::WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)

#uselib "WINHTTP.dll"
#func global WinHttpOpen "WinHttpOpen" sptr, sptr, sptr, sptr, sptr
; WinHttpOpen pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags   ; 戻り値は stat
; pszAgentW : LPCWSTR optional -> "sptr"
; dwAccessType : WINHTTP_ACCESS_TYPE -> "sptr"
; pszProxyW : LPCWSTR optional -> "sptr"
; pszProxyBypassW : LPCWSTR optional -> "sptr"
; dwFlags : DWORD -> "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 "WINHTTP.dll"
#cfunc global WinHttpOpen "WinHttpOpen" wstr, int, wstr, wstr, int
; res = WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)
; pszAgentW : LPCWSTR optional -> "wstr"
; dwAccessType : WINHTTP_ACCESS_TYPE -> "int"
; pszProxyW : LPCWSTR optional -> "wstr"
; pszProxyBypassW : LPCWSTR optional -> "wstr"
; dwFlags : DWORD -> "int"

; void* WinHttpOpen(LPCWSTR pszAgentW, WINHTTP_ACCESS_TYPE dwAccessType, LPCWSTR pszProxyW, LPCWSTR pszProxyBypassW, DWORD dwFlags)
#uselib "WINHTTP.dll"
#cfunc global WinHttpOpen "WinHttpOpen" wstr, int, wstr, wstr, int
; res = WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)
; pszAgentW : LPCWSTR optional -> "wstr"
; dwAccessType : WINHTTP_ACCESS_TYPE -> "int"
; pszProxyW : LPCWSTR optional -> "wstr"
; pszProxyBypassW : LPCWSTR optional -> "wstr"
; dwFlags : DWORD -> "int"

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

var (
	winhttp = windows.NewLazySystemDLL("WINHTTP.dll")
	procWinHttpOpen = winhttp.NewProc("WinHttpOpen")
)

// pszAgentW (LPCWSTR optional), dwAccessType (WINHTTP_ACCESS_TYPE), pszProxyW (LPCWSTR optional), pszProxyBypassW (LPCWSTR optional), dwFlags (DWORD)
r1, _, err := procWinHttpOpen.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszAgentW))),
	uintptr(dwAccessType),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszProxyW))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszProxyBypassW))),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void*

function WinHttpOpen(
  pszAgentW: PWideChar;   // LPCWSTR optional
  dwAccessType: DWORD;   // WINHTTP_ACCESS_TYPE
  pszProxyW: PWideChar;   // LPCWSTR optional
  pszProxyBypassW: PWideChar;   // LPCWSTR optional
  dwFlags: DWORD   // DWORD
): Pointer; stdcall;
  external 'WINHTTP.dll' name 'WinHttpOpen';

result := DllCall("WINHTTP\WinHttpOpen"
    , "WStr", pszAgentW   ; LPCWSTR optional
    , "UInt", dwAccessType   ; WINHTTP_ACCESS_TYPE
    , "WStr", pszProxyW   ; LPCWSTR optional
    , "WStr", pszProxyBypassW   ; LPCWSTR optional
    , "UInt", dwFlags   ; DWORD
    , "Ptr")   ; return: void*

●WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags) = DLL("WINHTTP.dll", "void* WinHttpOpen(char*, dword, char*, char*, dword)")
# 呼び出し: WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)
# pszAgentW : LPCWSTR optional -> "char*"
# dwAccessType : WINHTTP_ACCESS_TYPE -> "dword"
# pszProxyW : LPCWSTR optional -> "char*"
# pszProxyBypassW : LPCWSTR optional -> "char*"
# dwFlags : DWORD -> "dword"
# 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 "winhttp" fn WinHttpOpen(
    pszAgentW: [*c]const u16, // LPCWSTR optional
    dwAccessType: u32, // WINHTTP_ACCESS_TYPE
    pszProxyW: [*c]const u16, // LPCWSTR optional
    pszProxyBypassW: [*c]const u16, // LPCWSTR optional
    dwFlags: u32 // DWORD
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc WinHttpOpen(
    pszAgentW: WideCString,  # LPCWSTR optional
    dwAccessType: uint32,  # WINHTTP_ACCESS_TYPE
    pszProxyW: WideCString,  # LPCWSTR optional
    pszProxyBypassW: WideCString,  # LPCWSTR optional
    dwFlags: uint32  # DWORD
): pointer {.importc: "WinHttpOpen", stdcall, dynlib: "WINHTTP.dll".}

pragma(lib, "winhttp");
extern(Windows)
void* WinHttpOpen(
    const(wchar)* pszAgentW,   // LPCWSTR optional
    uint dwAccessType,   // WINHTTP_ACCESS_TYPE
    const(wchar)* pszProxyW,   // LPCWSTR optional
    const(wchar)* pszProxyBypassW,   // LPCWSTR optional
    uint dwFlags   // DWORD
);

ccall((:WinHttpOpen, "WINHTTP.dll"), stdcall, Ptr{Cvoid},
      (Cwstring, UInt32, Cwstring, Cwstring, UInt32),
      pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)
# pszAgentW : LPCWSTR optional -> Cwstring
# dwAccessType : WINHTTP_ACCESS_TYPE -> UInt32
# pszProxyW : LPCWSTR optional -> Cwstring
# pszProxyBypassW : LPCWSTR optional -> Cwstring
# dwFlags : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* WinHttpOpen(
    const uint16_t* pszAgentW,
    uint32_t dwAccessType,
    const uint16_t* pszProxyW,
    const uint16_t* pszProxyBypassW,
    uint32_t dwFlags);
]]
local winhttp = ffi.load("winhttp")
-- winhttp.WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)
-- pszAgentW : LPCWSTR optional
-- dwAccessType : WINHTTP_ACCESS_TYPE
-- pszProxyW : LPCWSTR optional
-- pszProxyBypassW : LPCWSTR optional
-- dwFlags : DWORD
-- 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('WINHTTP.dll');
const WinHttpOpen = lib.func('__stdcall', 'WinHttpOpen', 'void *', ['str16', 'uint32_t', 'str16', 'str16', 'uint32_t']);
// WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)
// pszAgentW : LPCWSTR optional -> 'str16'
// dwAccessType : WINHTTP_ACCESS_TYPE -> 'uint32_t'
// pszProxyW : LPCWSTR optional -> 'str16'
// pszProxyBypassW : LPCWSTR optional -> 'str16'
// dwFlags : DWORD -> '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("WINHTTP.dll", {
  WinHttpOpen: { parameters: ["buffer", "u32", "buffer", "buffer", "u32"], result: "pointer" },
});
// lib.symbols.WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags)
// pszAgentW : LPCWSTR optional -> "buffer"
// dwAccessType : WINHTTP_ACCESS_TYPE -> "u32"
// pszProxyW : LPCWSTR optional -> "buffer"
// pszProxyBypassW : LPCWSTR optional -> "buffer"
// dwFlags : DWORD -> "u32"
// 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
void* WinHttpOpen(
    const uint16_t* pszAgentW,
    uint32_t dwAccessType,
    const uint16_t* pszProxyW,
    const uint16_t* pszProxyBypassW,
    uint32_t dwFlags);
C, "WINHTTP.dll");
// $ffi->WinHttpOpen(pszAgentW, dwAccessType, pszProxyW, pszProxyBypassW, dwFlags);
// pszAgentW : LPCWSTR optional
// dwAccessType : WINHTTP_ACCESS_TYPE
// pszProxyW : LPCWSTR optional
// pszProxyBypassW : LPCWSTR optional
// dwFlags : DWORD
// 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 Winhttp extends StdCallLibrary {
    Winhttp INSTANCE = Native.load("winhttp", Winhttp.class);
    Pointer WinHttpOpen(
        WString pszAgentW,   // LPCWSTR optional
        int dwAccessType,   // WINHTTP_ACCESS_TYPE
        WString pszProxyW,   // LPCWSTR optional
        WString pszProxyBypassW,   // LPCWSTR optional
        int dwFlags   // DWORD
    );
}

@[Link("winhttp")]
lib LibWINHTTP
  fun WinHttpOpen = WinHttpOpen(
    pszAgentW : UInt16*,   # LPCWSTR optional
    dwAccessType : UInt32,   # WINHTTP_ACCESS_TYPE
    pszProxyW : UInt16*,   # LPCWSTR optional
    pszProxyBypassW : UInt16*,   # LPCWSTR optional
    dwFlags : UInt32   # DWORD
  ) : Void*
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 WinHttpOpenNative = Pointer<Void> Function(Pointer<Utf16>, Uint32, Pointer<Utf16>, Pointer<Utf16>, Uint32);
typedef WinHttpOpenDart = Pointer<Void> Function(Pointer<Utf16>, int, Pointer<Utf16>, Pointer<Utf16>, int);
final WinHttpOpen = DynamicLibrary.open('WINHTTP.dll')
    .lookupFunction<WinHttpOpenNative, WinHttpOpenDart>('WinHttpOpen');
// pszAgentW : LPCWSTR optional -> Pointer<Utf16>
// dwAccessType : WINHTTP_ACCESS_TYPE -> Uint32
// pszProxyW : LPCWSTR optional -> Pointer<Utf16>
// pszProxyBypassW : LPCWSTR optional -> Pointer<Utf16>
// dwFlags : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WinHttpOpen(
  pszAgentW: PWideChar;   // LPCWSTR optional
  dwAccessType: DWORD;   // WINHTTP_ACCESS_TYPE
  pszProxyW: PWideChar;   // LPCWSTR optional
  pszProxyBypassW: PWideChar;   // LPCWSTR optional
  dwFlags: DWORD   // DWORD
): Pointer; stdcall;
  external 'WINHTTP.dll' name 'WinHttpOpen';

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

foreign import stdcall safe "WinHttpOpen"
  c_WinHttpOpen :: CWString -> Word32 -> CWString -> CWString -> Word32 -> IO (Ptr ())
-- pszAgentW : LPCWSTR optional -> CWString
-- dwAccessType : WINHTTP_ACCESS_TYPE -> Word32
-- pszProxyW : LPCWSTR optional -> CWString
-- pszProxyBypassW : LPCWSTR optional -> CWString
-- dwFlags : DWORD -> 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 winhttpopen =
  foreign "WinHttpOpen"
    ((ptr uint16_t) @-> uint32_t @-> (ptr uint16_t) @-> (ptr uint16_t) @-> uint32_t @-> returning (ptr void))
(* pszAgentW : LPCWSTR optional -> (ptr uint16_t) *)
(* dwAccessType : WINHTTP_ACCESS_TYPE -> uint32_t *)
(* pszProxyW : LPCWSTR optional -> (ptr uint16_t) *)
(* pszProxyBypassW : LPCWSTR optional -> (ptr uint16_t) *)
(* dwFlags : DWORD -> 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 winhttp (t "WINHTTP.dll"))
(cffi:use-foreign-library winhttp)

(cffi:defcfun ("WinHttpOpen" win-http-open :convention :stdcall) :pointer
  (psz-agent-w (:string :encoding :utf-16le))   ; LPCWSTR optional
  (dw-access-type :uint32)   ; WINHTTP_ACCESS_TYPE
  (psz-proxy-w (:string :encoding :utf-16le))   ; LPCWSTR optional
  (psz-proxy-bypass-w (:string :encoding :utf-16le))   ; LPCWSTR optional
  (dw-flags :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WinHttpOpen = Win32::API::More->new('WINHTTP',
    'LPVOID WinHttpOpen(LPCWSTR pszAgentW, DWORD dwAccessType, LPCWSTR pszProxyW, LPCWSTR pszProxyBypassW, DWORD dwFlags)');
# my $ret = $WinHttpOpen->Call($pszAgentW, $dwAccessType, $pszProxyW, $pszProxyBypassW, $dwFlags);
# pszAgentW : LPCWSTR optional -> LPCWSTR
# dwAccessType : WINHTTP_ACCESS_TYPE -> DWORD
# pszProxyW : LPCWSTR optional -> LPCWSTR
# pszProxyBypassW : LPCWSTR optional -> LPCWSTR
# dwFlags : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。