VariantCopy

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

HRESULT VariantCopy(
    VARIANT* pvargDest,
    const VARIANT* pvargSrc
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VariantCopy(
    pvargDest As IntPtr,   ' VARIANT* in/out
    pvargSrc As IntPtr   ' VARIANT*
) As Integer
End Function

' pvargDest : VARIANT* in/out
' pvargSrc : VARIANT*
Declare PtrSafe Function VariantCopy Lib "oleaut32" ( _
    ByVal pvargDest As LongPtr, _
    ByVal pvargSrc 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

VariantCopy = ctypes.windll.oleaut32.VariantCopy
VariantCopy.restype = ctypes.c_int
VariantCopy.argtypes = [
    ctypes.c_void_p,  # pvargDest : VARIANT* in/out
    ctypes.c_void_p,  # pvargSrc : VARIANT*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VariantCopy = Fiddle::Function.new(
  lib['VariantCopy'],
  [
    Fiddle::TYPE_VOIDP,  # pvargDest : VARIANT* in/out
    Fiddle::TYPE_VOIDP,  # pvargSrc : VARIANT*
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VariantCopy(
        pvargDest: *mut VARIANT,  // VARIANT* in/out
        pvargSrc: *const VARIANT  // VARIANT*
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VariantCopy(IntPtr pvargDest, IntPtr pvargSrc);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VariantCopy' -Namespace Win32 -PassThru
# $api::VariantCopy(pvargDest, pvargSrc)

#uselib "OLEAUT32.dll"
#func global VariantCopy "VariantCopy" sptr, sptr
; VariantCopy varptr(pvargDest), varptr(pvargSrc)   ; 戻り値は stat
; pvargDest : VARIANT* in/out -> "sptr"
; pvargSrc : VARIANT* -> "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")
	procVariantCopy = oleaut32.NewProc("VariantCopy")
)

// pvargDest (VARIANT* in/out), pvargSrc (VARIANT*)
r1, _, err := procVariantCopy.Call(
	uintptr(pvargDest),
	uintptr(pvargSrc),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VariantCopy(
  pvargDest: Pointer;   // VARIANT* in/out
  pvargSrc: Pointer   // VARIANT*
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VariantCopy';

result := DllCall("OLEAUT32\VariantCopy"
    , "Ptr", pvargDest   ; VARIANT* in/out
    , "Ptr", pvargSrc   ; VARIANT*
    , "Int")   ; return: HRESULT

●VariantCopy(pvargDest, pvargSrc) = DLL("OLEAUT32.dll", "int VariantCopy(void*, void*)")
# 呼び出し: VariantCopy(pvargDest, pvargSrc)
# pvargDest : VARIANT* in/out -> "void*"
# pvargSrc : VARIANT* -> "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 VariantCopy(
    pvargDest: [*c]VARIANT, // VARIANT* in/out
    pvargSrc: [*c]VARIANT // VARIANT*
) callconv(std.os.windows.WINAPI) i32;

proc VariantCopy(
    pvargDest: ptr VARIANT,  # VARIANT* in/out
    pvargSrc: ptr VARIANT  # VARIANT*
): int32 {.importc: "VariantCopy", stdcall, dynlib: "OLEAUT32.dll".}

pragma(lib, "oleaut32");
extern(Windows)
int VariantCopy(
    VARIANT* pvargDest,   // VARIANT* in/out
    VARIANT* pvargSrc   // VARIANT*
);

ccall((:VariantCopy, "OLEAUT32.dll"), stdcall, Int32,
      (Ptr{VARIANT}, Ptr{VARIANT}),
      pvargDest, pvargSrc)
# pvargDest : VARIANT* in/out -> Ptr{VARIANT}
# pvargSrc : VARIANT* -> Ptr{VARIANT}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t VariantCopy(
    void* pvargDest,
    void* pvargSrc);
]]
local oleaut32 = ffi.load("oleaut32")
-- oleaut32.VariantCopy(pvargDest, pvargSrc)
-- pvargDest : VARIANT* in/out
-- pvargSrc : VARIANT*
-- 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 VariantCopy = lib.func('__stdcall', 'VariantCopy', 'int32_t', ['void *', 'void *']);
// VariantCopy(pvargDest, pvargSrc)
// pvargDest : VARIANT* in/out -> 'void *'
// pvargSrc : VARIANT* -> '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("OLEAUT32.dll", {
  VariantCopy: { parameters: ["pointer", "pointer"], result: "i32" },
});
// lib.symbols.VariantCopy(pvargDest, pvargSrc)
// pvargDest : VARIANT* in/out -> "pointer"
// pvargSrc : VARIANT* -> "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 VariantCopy(
    void* pvargDest,
    void* pvargSrc);
C, "OLEAUT32.dll");
// $ffi->VariantCopy(pvargDest, pvargSrc);
// pvargDest : VARIANT* in/out
// pvargSrc : VARIANT*
// 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 VariantCopy(
        Pointer pvargDest,   // VARIANT* in/out
        Pointer pvargSrc   // VARIANT*
    );
}

@[Link("oleaut32")]
lib LibOLEAUT32
  fun VariantCopy = VariantCopy(
    pvargDest : VARIANT*,   # VARIANT* in/out
    pvargSrc : VARIANT*   # VARIANT*
  ) : 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 VariantCopyNative = Int32 Function(Pointer<Void>, Pointer<Void>);
typedef VariantCopyDart = int Function(Pointer<Void>, Pointer<Void>);
final VariantCopy = DynamicLibrary.open('OLEAUT32.dll')
    .lookupFunction<VariantCopyNative, VariantCopyDart>('VariantCopy');
// pvargDest : VARIANT* in/out -> Pointer<Void>
// pvargSrc : VARIANT* -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function VariantCopy(
  pvargDest: Pointer;   // VARIANT* in/out
  pvargSrc: Pointer   // VARIANT*
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VariantCopy';

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

foreign import stdcall safe "VariantCopy"
  c_VariantCopy :: Ptr () -> Ptr () -> IO Int32
-- pvargDest : VARIANT* in/out -> Ptr ()
-- pvargSrc : VARIANT* -> 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。

open Ctypes
open Foreign

let variantcopy =
  foreign "VariantCopy"
    ((ptr void) @-> (ptr void) @-> returning int32_t)
(* pvargDest : VARIANT* in/out -> (ptr void) *)
(* pvargSrc : VARIANT* -> (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 oleaut32 (t "OLEAUT32.dll"))
(cffi:use-foreign-library oleaut32)

(cffi:defcfun ("VariantCopy" variant-copy :convention :stdcall) :int32
  (pvarg-dest :pointer)   ; VARIANT* in/out
  (pvarg-src :pointer))   ; VARIANT*
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $VariantCopy = Win32::API::More->new('OLEAUT32',
    'int VariantCopy(LPVOID pvargDest, LPVOID pvargSrc)');
# my $ret = $VariantCopy->Call($pvargDest, $pvargSrc);
# pvargDest : VARIANT* in/out -> LPVOID
# pvargSrc : VARIANT* -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。