VarBstrFromDec

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

HRESULT VarBstrFromDec(
    const DECIMAL* pdecIn,
    DWORD lcid,
    DWORD dwFlags,
    LPWSTR* pbstrOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarBstrFromDec(
    pdecIn As IntPtr,   ' DECIMAL*
    lcid As UInteger,   ' DWORD
    dwFlags As UInteger,   ' DWORD
    pbstrOut As IntPtr   ' LPWSTR* out
) As Integer
End Function

' pdecIn : DECIMAL*
' lcid : DWORD
' dwFlags : DWORD
' pbstrOut : LPWSTR* out
Declare PtrSafe Function VarBstrFromDec Lib "oleaut32" ( _
    ByVal pdecIn As LongPtr, _
    ByVal lcid As Long, _
    ByVal dwFlags As Long, _
    ByVal pbstrOut 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

VarBstrFromDec = ctypes.windll.oleaut32.VarBstrFromDec
VarBstrFromDec.restype = ctypes.c_int
VarBstrFromDec.argtypes = [
    ctypes.c_void_p,  # pdecIn : DECIMAL*
    wintypes.DWORD,  # lcid : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # pbstrOut : LPWSTR* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarBstrFromDec = Fiddle::Function.new(
  lib['VarBstrFromDec'],
  [
    Fiddle::TYPE_VOIDP,  # pdecIn : DECIMAL*
    -Fiddle::TYPE_INT,  # lcid : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # pbstrOut : LPWSTR* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn VarBstrFromDec(
        pdecIn: *const DECIMAL,  // DECIMAL*
        lcid: u32,  // DWORD
        dwFlags: u32,  // DWORD
        pbstrOut: *mut *mut u16  // LPWSTR* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarBstrFromDec(IntPtr pdecIn, uint lcid, uint dwFlags, IntPtr pbstrOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarBstrFromDec' -Namespace Win32 -PassThru
# $api::VarBstrFromDec(pdecIn, lcid, dwFlags, pbstrOut)

#uselib "OLEAUT32.dll"
#func global VarBstrFromDec "VarBstrFromDec" sptr, sptr, sptr, sptr
; VarBstrFromDec varptr(pdecIn), lcid, dwFlags, varptr(pbstrOut)   ; 戻り値は stat
; pdecIn : DECIMAL* -> "sptr"
; lcid : DWORD -> "sptr"
; dwFlags : DWORD -> "sptr"
; pbstrOut : LPWSTR* 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")
	procVarBstrFromDec = oleaut32.NewProc("VarBstrFromDec")
)

// pdecIn (DECIMAL*), lcid (DWORD), dwFlags (DWORD), pbstrOut (LPWSTR* out)
r1, _, err := procVarBstrFromDec.Call(
	uintptr(pdecIn),
	uintptr(lcid),
	uintptr(dwFlags),
	uintptr(pbstrOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarBstrFromDec(
  pdecIn: Pointer;   // DECIMAL*
  lcid: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  pbstrOut: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarBstrFromDec';

result := DllCall("OLEAUT32\VarBstrFromDec"
    , "Ptr", pdecIn   ; DECIMAL*
    , "UInt", lcid   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Ptr", pbstrOut   ; LPWSTR* out
    , "Int")   ; return: HRESULT

●VarBstrFromDec(pdecIn, lcid, dwFlags, pbstrOut) = DLL("OLEAUT32.dll", "int VarBstrFromDec(void*, dword, dword, void*)")
# 呼び出し: VarBstrFromDec(pdecIn, lcid, dwFlags, pbstrOut)
# pdecIn : DECIMAL* -> "void*"
# lcid : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# pbstrOut : LPWSTR* 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 VarBstrFromDec(
    pdecIn: [*c]DECIMAL, // DECIMAL*
    lcid: u32, // DWORD
    dwFlags: u32, // DWORD
    pbstrOut: [*c][*c]u16 // LPWSTR* out
) callconv(std.os.windows.WINAPI) i32;

proc VarBstrFromDec(
    pdecIn: ptr DECIMAL,  # DECIMAL*
    lcid: uint32,  # DWORD
    dwFlags: uint32,  # DWORD
    pbstrOut: ptr WideCString  # LPWSTR* out
): int32 {.importc: "VarBstrFromDec", stdcall, dynlib: "OLEAUT32.dll".}

pragma(lib, "oleaut32");
extern(Windows)
int VarBstrFromDec(
    DECIMAL* pdecIn,   // DECIMAL*
    uint lcid,   // DWORD
    uint dwFlags,   // DWORD
    wchar** pbstrOut   // LPWSTR* out
);

ccall((:VarBstrFromDec, "OLEAUT32.dll"), stdcall, Int32,
      (Ptr{DECIMAL}, UInt32, UInt32, Ptr{Ptr{UInt16}}),
      pdecIn, lcid, dwFlags, pbstrOut)
# pdecIn : DECIMAL* -> Ptr{DECIMAL}
# lcid : DWORD -> UInt32
# dwFlags : DWORD -> UInt32
# pbstrOut : LPWSTR* out -> Ptr{Ptr{UInt16}}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t VarBstrFromDec(
    void* pdecIn,
    uint32_t lcid,
    uint32_t dwFlags,
    uint16_t** pbstrOut);
]]
local oleaut32 = ffi.load("oleaut32")
-- oleaut32.VarBstrFromDec(pdecIn, lcid, dwFlags, pbstrOut)
-- pdecIn : DECIMAL*
-- lcid : DWORD
-- dwFlags : DWORD
-- pbstrOut : LPWSTR* 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 VarBstrFromDec = lib.func('__stdcall', 'VarBstrFromDec', 'int32_t', ['void *', 'uint32_t', 'uint32_t', 'void *']);
// VarBstrFromDec(pdecIn, lcid, dwFlags, pbstrOut)
// pdecIn : DECIMAL* -> 'void *'
// lcid : DWORD -> 'uint32_t'
// dwFlags : DWORD -> 'uint32_t'
// pbstrOut : LPWSTR* out -> '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", {
  VarBstrFromDec: { parameters: ["pointer", "u32", "u32", "pointer"], result: "i32" },
});
// lib.symbols.VarBstrFromDec(pdecIn, lcid, dwFlags, pbstrOut)
// pdecIn : DECIMAL* -> "pointer"
// lcid : DWORD -> "u32"
// dwFlags : DWORD -> "u32"
// pbstrOut : LPWSTR* 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 VarBstrFromDec(
    void* pdecIn,
    uint32_t lcid,
    uint32_t dwFlags,
    uint16_t** pbstrOut);
C, "OLEAUT32.dll");
// $ffi->VarBstrFromDec(pdecIn, lcid, dwFlags, pbstrOut);
// pdecIn : DECIMAL*
// lcid : DWORD
// dwFlags : DWORD
// pbstrOut : LPWSTR* 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 VarBstrFromDec(
        Pointer pdecIn,   // DECIMAL*
        int lcid,   // DWORD
        int dwFlags,   // DWORD
        PointerByReference pbstrOut   // LPWSTR* out
    );
}

@[Link("oleaut32")]
lib LibOLEAUT32
  fun VarBstrFromDec = VarBstrFromDec(
    pdecIn : DECIMAL*,   # DECIMAL*
    lcid : UInt32,   # DWORD
    dwFlags : UInt32,   # DWORD
    pbstrOut : UInt16**   # LPWSTR* 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 VarBstrFromDecNative = Int32 Function(Pointer<Void>, Uint32, Uint32, Pointer<Pointer<Utf16>>);
typedef VarBstrFromDecDart = int Function(Pointer<Void>, int, int, Pointer<Pointer<Utf16>>);
final VarBstrFromDec = DynamicLibrary.open('OLEAUT32.dll')
    .lookupFunction<VarBstrFromDecNative, VarBstrFromDecDart>('VarBstrFromDec');
// pdecIn : DECIMAL* -> Pointer<Void>
// lcid : DWORD -> Uint32
// dwFlags : DWORD -> Uint32
// pbstrOut : LPWSTR* out -> Pointer<Pointer<Utf16>>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function VarBstrFromDec(
  pdecIn: Pointer;   // DECIMAL*
  lcid: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  pbstrOut: PPWideChar   // LPWSTR* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarBstrFromDec';

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

foreign import stdcall safe "VarBstrFromDec"
  c_VarBstrFromDec :: Ptr () -> Word32 -> Word32 -> Ptr CWString -> IO Int32
-- pdecIn : DECIMAL* -> Ptr ()
-- lcid : DWORD -> Word32
-- dwFlags : DWORD -> Word32
-- pbstrOut : LPWSTR* out -> Ptr CWString
-- 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 varbstrfromdec =
  foreign "VarBstrFromDec"
    ((ptr void) @-> uint32_t @-> uint32_t @-> (ptr (ptr uint16_t)) @-> returning int32_t)
(* pdecIn : DECIMAL* -> (ptr void) *)
(* lcid : DWORD -> uint32_t *)
(* dwFlags : DWORD -> uint32_t *)
(* pbstrOut : LPWSTR* out -> (ptr (ptr uint16_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 ("VarBstrFromDec" var-bstr-from-dec :convention :stdcall) :int32
  (pdec-in :pointer)   ; DECIMAL*
  (lcid :uint32)   ; DWORD
  (dw-flags :uint32)   ; DWORD
  (pbstr-out :pointer))   ; LPWSTR* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $VarBstrFromDec = Win32::API::More->new('OLEAUT32',
    'int VarBstrFromDec(LPVOID pdecIn, DWORD lcid, DWORD dwFlags, LPVOID pbstrOut)');
# my $ret = $VarBstrFromDec->Call($pdecIn, $lcid, $dwFlags, $pbstrOut);
# pdecIn : DECIMAL* -> LPVOID
# lcid : DWORD -> DWORD
# dwFlags : DWORD -> DWORD
# pbstrOut : LPWSTR* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。