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)。