WinHttpConnect

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

void* WinHttpConnect(
    void* hSession,
    LPCWSTR pswzServerName,
    WORD nServerPort,
    DWORD dwReserved
);

<DllImport("WINHTTP.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function WinHttpConnect(
    hSession As IntPtr,   ' void* in/out
    <MarshalAs(UnmanagedType.LPWStr)> pswzServerName As String,   ' LPCWSTR
    nServerPort As UShort,   ' WORD
    dwReserved As UInteger   ' DWORD
) As IntPtr
End Function

' hSession : void* in/out
' pswzServerName : LPCWSTR
' nServerPort : WORD
' dwReserved : DWORD
Declare PtrSafe Function WinHttpConnect Lib "winhttp" ( _
    ByVal hSession As LongPtr, _
    ByVal pswzServerName As LongPtr, _
    ByVal nServerPort As Integer, _
    ByVal dwReserved 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

WinHttpConnect = ctypes.windll.winhttp.WinHttpConnect
WinHttpConnect.restype = ctypes.c_void_p
WinHttpConnect.argtypes = [
    ctypes.POINTER(None),  # hSession : void* in/out
    wintypes.LPCWSTR,  # pswzServerName : LPCWSTR
    ctypes.c_ushort,  # nServerPort : WORD
    wintypes.DWORD,  # dwReserved : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WINHTTP.dll')
WinHttpConnect = Fiddle::Function.new(
  lib['WinHttpConnect'],
  [
    Fiddle::TYPE_VOIDP,  # hSession : void* in/out
    Fiddle::TYPE_VOIDP,  # pswzServerName : LPCWSTR
    -Fiddle::TYPE_SHORT,  # nServerPort : WORD
    -Fiddle::TYPE_INT,  # dwReserved : DWORD
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "winhttp")]
extern "system" {
    fn WinHttpConnect(
        hSession: *mut (),  // void* in/out
        pswzServerName: *const u16,  // LPCWSTR
        nServerPort: u16,  // WORD
        dwReserved: u32  // DWORD
    ) -> *mut ();
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WINHTTP.dll", SetLastError = true)]
public static extern IntPtr WinHttpConnect(IntPtr hSession, [MarshalAs(UnmanagedType.LPWStr)] string pswzServerName, ushort nServerPort, uint dwReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WINHTTP_WinHttpConnect' -Namespace Win32 -PassThru
# $api::WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved)

#uselib "WINHTTP.dll"
#func global WinHttpConnect "WinHttpConnect" sptr, sptr, sptr, sptr
; WinHttpConnect hSession, pswzServerName, nServerPort, dwReserved   ; 戻り値は stat
; hSession : void* in/out -> "sptr"
; pswzServerName : LPCWSTR -> "sptr"
; nServerPort : WORD -> "sptr"
; dwReserved : 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 WinHttpConnect "WinHttpConnect" sptr, wstr, int, int
; res = WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved)
; hSession : void* in/out -> "sptr"
; pswzServerName : LPCWSTR -> "wstr"
; nServerPort : WORD -> "int"
; dwReserved : DWORD -> "int"

; void* WinHttpConnect(void* hSession, LPCWSTR pswzServerName, WORD nServerPort, DWORD dwReserved)
#uselib "WINHTTP.dll"
#cfunc global WinHttpConnect "WinHttpConnect" intptr, wstr, int, int
; res = WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved)
; hSession : void* in/out -> "intptr"
; pswzServerName : LPCWSTR -> "wstr"
; nServerPort : WORD -> "int"
; dwReserved : DWORD -> "int"

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

var (
	winhttp = windows.NewLazySystemDLL("WINHTTP.dll")
	procWinHttpConnect = winhttp.NewProc("WinHttpConnect")
)

// hSession (void* in/out), pswzServerName (LPCWSTR), nServerPort (WORD), dwReserved (DWORD)
r1, _, err := procWinHttpConnect.Call(
	uintptr(hSession),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pswzServerName))),
	uintptr(nServerPort),
	uintptr(dwReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void*

function WinHttpConnect(
  hSession: Pointer;   // void* in/out
  pswzServerName: PWideChar;   // LPCWSTR
  nServerPort: Word;   // WORD
  dwReserved: DWORD   // DWORD
): Pointer; stdcall;
  external 'WINHTTP.dll' name 'WinHttpConnect';

result := DllCall("WINHTTP\WinHttpConnect"
    , "Ptr", hSession   ; void* in/out
    , "WStr", pswzServerName   ; LPCWSTR
    , "UShort", nServerPort   ; WORD
    , "UInt", dwReserved   ; DWORD
    , "Ptr")   ; return: void*

●WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved) = DLL("WINHTTP.dll", "void* WinHttpConnect(void*, char*, int, dword)")
# 呼び出し: WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved)
# hSession : void* in/out -> "void*"
# pswzServerName : LPCWSTR -> "char*"
# nServerPort : WORD -> "int"
# dwReserved : 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 WinHttpConnect(
    hSession: ?*anyopaque, // void* in/out
    pswzServerName: [*c]const u16, // LPCWSTR
    nServerPort: u16, // WORD
    dwReserved: u32 // DWORD
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc WinHttpConnect(
    hSession: pointer,  # void* in/out
    pswzServerName: WideCString,  # LPCWSTR
    nServerPort: uint16,  # WORD
    dwReserved: uint32  # DWORD
): pointer {.importc: "WinHttpConnect", stdcall, dynlib: "WINHTTP.dll".}

pragma(lib, "winhttp");
extern(Windows)
void* WinHttpConnect(
    void* hSession,   // void* in/out
    const(wchar)* pswzServerName,   // LPCWSTR
    ushort nServerPort,   // WORD
    uint dwReserved   // DWORD
);

ccall((:WinHttpConnect, "WINHTTP.dll"), stdcall, Ptr{Cvoid},
      (Ptr{Cvoid}, Cwstring, UInt16, UInt32),
      hSession, pswzServerName, nServerPort, dwReserved)
# hSession : void* in/out -> Ptr{Cvoid}
# pswzServerName : LPCWSTR -> Cwstring
# nServerPort : WORD -> UInt16
# dwReserved : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* WinHttpConnect(
    void* hSession,
    const uint16_t* pswzServerName,
    uint16_t nServerPort,
    uint32_t dwReserved);
]]
local winhttp = ffi.load("winhttp")
-- winhttp.WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved)
-- hSession : void* in/out
-- pswzServerName : LPCWSTR
-- nServerPort : WORD
-- dwReserved : 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 WinHttpConnect = lib.func('__stdcall', 'WinHttpConnect', 'void *', ['void *', 'str16', 'uint16_t', 'uint32_t']);
// WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved)
// hSession : void* in/out -> 'void *'
// pswzServerName : LPCWSTR -> 'str16'
// nServerPort : WORD -> 'uint16_t'
// dwReserved : 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", {
  WinHttpConnect: { parameters: ["pointer", "buffer", "u16", "u32"], result: "pointer" },
});
// lib.symbols.WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved)
// hSession : void* in/out -> "pointer"
// pswzServerName : LPCWSTR -> "buffer"
// nServerPort : WORD -> "u16"
// dwReserved : 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* WinHttpConnect(
    void* hSession,
    const uint16_t* pswzServerName,
    uint16_t nServerPort,
    uint32_t dwReserved);
C, "WINHTTP.dll");
// $ffi->WinHttpConnect(hSession, pswzServerName, nServerPort, dwReserved);
// hSession : void* in/out
// pswzServerName : LPCWSTR
// nServerPort : WORD
// dwReserved : 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 WinHttpConnect(
        Pointer hSession,   // void* in/out
        WString pswzServerName,   // LPCWSTR
        short nServerPort,   // WORD
        int dwReserved   // DWORD
    );
}

@[Link("winhttp")]
lib LibWINHTTP
  fun WinHttpConnect = WinHttpConnect(
    hSession : Void*,   # void* in/out
    pswzServerName : UInt16*,   # LPCWSTR
    nServerPort : UInt16,   # WORD
    dwReserved : 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 WinHttpConnectNative = Pointer<Void> Function(Pointer<Void>, Pointer<Utf16>, Uint16, Uint32);
typedef WinHttpConnectDart = Pointer<Void> Function(Pointer<Void>, Pointer<Utf16>, int, int);
final WinHttpConnect = DynamicLibrary.open('WINHTTP.dll')
    .lookupFunction<WinHttpConnectNative, WinHttpConnectDart>('WinHttpConnect');
// hSession : void* in/out -> Pointer<Void>
// pswzServerName : LPCWSTR -> Pointer<Utf16>
// nServerPort : WORD -> Uint16
// dwReserved : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function WinHttpConnect(
  hSession: Pointer;   // void* in/out
  pswzServerName: PWideChar;   // LPCWSTR
  nServerPort: Word;   // WORD
  dwReserved: DWORD   // DWORD
): Pointer; stdcall;
  external 'WINHTTP.dll' name 'WinHttpConnect';

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

foreign import stdcall safe "WinHttpConnect"
  c_WinHttpConnect :: Ptr () -> CWString -> Word16 -> Word32 -> IO (Ptr ())
-- hSession : void* in/out -> Ptr ()
-- pswzServerName : LPCWSTR -> CWString
-- nServerPort : WORD -> Word16
-- dwReserved : 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 winhttpconnect =
  foreign "WinHttpConnect"
    ((ptr void) @-> (ptr uint16_t) @-> uint16_t @-> uint32_t @-> returning (ptr void))
(* hSession : void* in/out -> (ptr void) *)
(* pswzServerName : LPCWSTR -> (ptr uint16_t) *)
(* nServerPort : WORD -> uint16_t *)
(* dwReserved : 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 ("WinHttpConnect" win-http-connect :convention :stdcall) :pointer
  (h-session :pointer)   ; void* in/out
  (pswz-server-name (:string :encoding :utf-16le))   ; LPCWSTR
  (n-server-port :uint16)   ; WORD
  (dw-reserved :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $WinHttpConnect = Win32::API::More->new('WINHTTP',
    'LPVOID WinHttpConnect(LPVOID hSession, LPCWSTR pswzServerName, WORD nServerPort, DWORD dwReserved)');
# my $ret = $WinHttpConnect->Call($hSession, $pswzServerName, $nServerPort, $dwReserved);
# hSession : void* in/out -> LPVOID
# pswzServerName : LPCWSTR -> LPCWSTR
# nServerPort : WORD -> WORD
# dwReserved : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。