VarI2FromI4

// OLEAUT32.dll
#include <windows.h>

HRESULT VarI2FromI4(
    INT lIn,
    SHORT* psOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarI2FromI4(
    lIn As Integer,   ' INT
    <Out> ByRef psOut As Short   ' SHORT* out
) As Integer
End Function

' lIn : INT
' psOut : SHORT* out
Declare PtrSafe Function VarI2FromI4 Lib "oleaut32" ( _
    ByVal lIn As Long, _
    ByRef psOut As Integer) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

VarI2FromI4 = ctypes.windll.oleaut32.VarI2FromI4
VarI2FromI4.restype = ctypes.c_int
VarI2FromI4.argtypes = [
    ctypes.c_int,  # lIn : INT
    ctypes.POINTER(ctypes.c_short),  # psOut : SHORT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarI2FromI4 = Fiddle::Function.new(
  lib['VarI2FromI4'],
  [
    Fiddle::TYPE_INT,  # lIn : INT
    Fiddle::TYPE_VOIDP,  # psOut : SHORT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarI2FromI4(
        lIn: i32,  // INT
        psOut: *mut i16  // SHORT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarI2FromI4(int lIn, out short psOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarI2FromI4' -Namespace Win32 -PassThru
# $api::VarI2FromI4(lIn, psOut)

#uselib "OLEAUT32.dll"
#func global VarI2FromI4 "VarI2FromI4" sptr, sptr
; VarI2FromI4 lIn, varptr(psOut)   ; 戻り値は stat
; lIn : INT -> "sptr"
; psOut : SHORT* 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 (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procVarI2FromI4 = oleaut32.NewProc("VarI2FromI4")
)

// lIn (INT), psOut (SHORT* out)
r1, _, err := procVarI2FromI4.Call(
	uintptr(lIn),
	uintptr(psOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarI2FromI4(
  lIn: Integer;   // INT
  psOut: Pointer   // SHORT* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarI2FromI4';

result := DllCall("OLEAUT32\VarI2FromI4"
    , "Int", lIn   ; INT
    , "Ptr", psOut   ; SHORT* out
    , "Int")   ; return: HRESULT

●VarI2FromI4(lIn, psOut) = DLL("OLEAUT32.dll", "int VarI2FromI4(int, void*)")
# 呼び出し: VarI2FromI4(lIn, psOut)
# lIn : INT -> "int"
# psOut : SHORT* 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 "oleaut32" fn VarI2FromI4(
    lIn: i32, // INT
    psOut: [*c]i16 // SHORT* out
) callconv(std.os.windows.WINAPI) i32;

proc VarI2FromI4(
    lIn: int32,  # INT
    psOut: ptr int16  # SHORT* out
): int32 {.importc: "VarI2FromI4", stdcall, dynlib: "OLEAUT32.dll".}

pragma(lib, "oleaut32");
extern(Windows)
int VarI2FromI4(
    int lIn,   // INT
    short* psOut   // SHORT* out
);

ccall((:VarI2FromI4, "OLEAUT32.dll"), stdcall, Int32,
      (Int32, Ptr{Int16}),
      lIn, psOut)
# lIn : INT -> Int32
# psOut : SHORT* out -> Ptr{Int16}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t VarI2FromI4(
    int32_t lIn,
    int16_t* psOut);
]]
local oleaut32 = ffi.load("oleaut32")
-- oleaut32.VarI2FromI4(lIn, psOut)
-- lIn : INT
-- psOut : SHORT* 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('OLEAUT32.dll');
const VarI2FromI4 = lib.func('__stdcall', 'VarI2FromI4', 'int32_t', ['int32_t', 'int16_t *']);
// VarI2FromI4(lIn, psOut)
// lIn : INT -> 'int32_t'
// psOut : SHORT* out -> 'int16_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("OLEAUT32.dll", {
  VarI2FromI4: { parameters: ["i32", "pointer"], result: "i32" },
});
// lib.symbols.VarI2FromI4(lIn, psOut)
// lIn : INT -> "i32"
// psOut : SHORT* 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 VarI2FromI4(
    int32_t lIn,
    int16_t* psOut);
C, "OLEAUT32.dll");
// $ffi->VarI2FromI4(lIn, psOut);
// lIn : INT
// psOut : SHORT* 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 Oleaut32 extends StdCallLibrary {
    Oleaut32 INSTANCE = Native.load("oleaut32", Oleaut32.class);
    int VarI2FromI4(
        int lIn,   // INT
        ShortByReference psOut   // SHORT* out
    );
}

@[Link("oleaut32")]
lib LibOLEAUT32
  fun VarI2FromI4 = VarI2FromI4(
    lIn : Int32,   # INT
    psOut : Int16*   # SHORT* 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 VarI2FromI4Native = Int32 Function(Int32, Pointer<Int16>);
typedef VarI2FromI4Dart = int Function(int, Pointer<Int16>);
final VarI2FromI4 = DynamicLibrary.open('OLEAUT32.dll')
    .lookupFunction<VarI2FromI4Native, VarI2FromI4Dart>('VarI2FromI4');
// lIn : INT -> Int32
// psOut : SHORT* out -> Pointer<Int16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function VarI2FromI4(
  lIn: Integer;   // INT
  psOut: Pointer   // SHORT* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarI2FromI4';

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

foreign import stdcall safe "VarI2FromI4"
  c_VarI2FromI4 :: Int32 -> Ptr Int16 -> IO Int32
-- lIn : INT -> Int32
-- psOut : SHORT* out -> Ptr Int16
-- 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 vari2fromi4 =
  foreign "VarI2FromI4"
    (int32_t @-> (ptr int16_t) @-> returning int32_t)
(* lIn : INT -> int32_t *)
(* psOut : SHORT* out -> (ptr int16_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 oleaut32 (t "OLEAUT32.dll"))
(cffi:use-foreign-library oleaut32)

(cffi:defcfun ("VarI2FromI4" var-i2-from-i4 :convention :stdcall) :int32
  (l-in :int32)   ; INT
  (ps-out :pointer))   ; SHORT* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $VarI2FromI4 = Win32::API::More->new('OLEAUT32',
    'int VarI2FromI4(int lIn, LPVOID psOut)');
# my $ret = $VarI2FromI4->Call($lIn, $psOut);
# lIn : INT -> int
# psOut : SHORT* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。