VarDecFromStr

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

HRESULT VarDecFromStr(
    LPCWSTR strIn,
    DWORD lcid,
    DWORD dwFlags,
    DECIMAL* pdecOut
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function VarDecFromStr(
    <MarshalAs(UnmanagedType.LPWStr)> strIn As String,   ' LPCWSTR
    lcid As UInteger,   ' DWORD
    dwFlags As UInteger,   ' DWORD
    pdecOut As IntPtr   ' DECIMAL* out
) As Integer
End Function

' strIn : LPCWSTR
' lcid : DWORD
' dwFlags : DWORD
' pdecOut : DECIMAL* out
Declare PtrSafe Function VarDecFromStr Lib "oleaut32" ( _
    ByVal strIn As LongPtr, _
    ByVal lcid As Long, _
    ByVal dwFlags As Long, _
    ByVal pdecOut 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

VarDecFromStr = ctypes.windll.oleaut32.VarDecFromStr
VarDecFromStr.restype = ctypes.c_int
VarDecFromStr.argtypes = [
    wintypes.LPCWSTR,  # strIn : LPCWSTR
    wintypes.DWORD,  # lcid : DWORD
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # pdecOut : DECIMAL* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
VarDecFromStr = Fiddle::Function.new(
  lib['VarDecFromStr'],
  [
    Fiddle::TYPE_VOIDP,  # strIn : LPCWSTR
    -Fiddle::TYPE_INT,  # lcid : DWORD
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # pdecOut : DECIMAL* out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int VarDecFromStr([MarshalAs(UnmanagedType.LPWStr)] string strIn, uint lcid, uint dwFlags, IntPtr pdecOut);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_VarDecFromStr' -Namespace Win32 -PassThru
# $api::VarDecFromStr(strIn, lcid, dwFlags, pdecOut)

#uselib "OLEAUT32.dll"
#func global VarDecFromStr "VarDecFromStr" sptr, sptr, sptr, sptr
; VarDecFromStr strIn, lcid, dwFlags, varptr(pdecOut)   ; 戻り値は stat
; strIn : LPCWSTR -> "sptr"
; lcid : DWORD -> "sptr"
; dwFlags : DWORD -> "sptr"
; pdecOut : DECIMAL* 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")
	procVarDecFromStr = oleaut32.NewProc("VarDecFromStr")
)

// strIn (LPCWSTR), lcid (DWORD), dwFlags (DWORD), pdecOut (DECIMAL* out)
r1, _, err := procVarDecFromStr.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(strIn))),
	uintptr(lcid),
	uintptr(dwFlags),
	uintptr(pdecOut),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function VarDecFromStr(
  strIn: PWideChar;   // LPCWSTR
  lcid: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  pdecOut: Pointer   // DECIMAL* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarDecFromStr';

result := DllCall("OLEAUT32\VarDecFromStr"
    , "WStr", strIn   ; LPCWSTR
    , "UInt", lcid   ; DWORD
    , "UInt", dwFlags   ; DWORD
    , "Ptr", pdecOut   ; DECIMAL* out
    , "Int")   ; return: HRESULT

●VarDecFromStr(strIn, lcid, dwFlags, pdecOut) = DLL("OLEAUT32.dll", "int VarDecFromStr(char*, dword, dword, void*)")
# 呼び出し: VarDecFromStr(strIn, lcid, dwFlags, pdecOut)
# strIn : LPCWSTR -> "char*"
# lcid : DWORD -> "dword"
# dwFlags : DWORD -> "dword"
# pdecOut : DECIMAL* 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 VarDecFromStr(
    strIn: [*c]const u16, // LPCWSTR
    lcid: u32, // DWORD
    dwFlags: u32, // DWORD
    pdecOut: [*c]DECIMAL // DECIMAL* out
) callconv(std.os.windows.WINAPI) i32;

proc VarDecFromStr(
    strIn: WideCString,  # LPCWSTR
    lcid: uint32,  # DWORD
    dwFlags: uint32,  # DWORD
    pdecOut: ptr DECIMAL  # DECIMAL* out
): int32 {.importc: "VarDecFromStr", stdcall, dynlib: "OLEAUT32.dll".}

pragma(lib, "oleaut32");
extern(Windows)
int VarDecFromStr(
    const(wchar)* strIn,   // LPCWSTR
    uint lcid,   // DWORD
    uint dwFlags,   // DWORD
    DECIMAL* pdecOut   // DECIMAL* out
);

ccall((:VarDecFromStr, "OLEAUT32.dll"), stdcall, Int32,
      (Cwstring, UInt32, UInt32, Ptr{DECIMAL}),
      strIn, lcid, dwFlags, pdecOut)
# strIn : LPCWSTR -> Cwstring
# lcid : DWORD -> UInt32
# dwFlags : DWORD -> UInt32
# pdecOut : DECIMAL* out -> Ptr{DECIMAL}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t VarDecFromStr(
    const uint16_t* strIn,
    uint32_t lcid,
    uint32_t dwFlags,
    void* pdecOut);
]]
local oleaut32 = ffi.load("oleaut32")
-- oleaut32.VarDecFromStr(strIn, lcid, dwFlags, pdecOut)
-- strIn : LPCWSTR
-- lcid : DWORD
-- dwFlags : DWORD
-- pdecOut : DECIMAL* 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 VarDecFromStr = lib.func('__stdcall', 'VarDecFromStr', 'int32_t', ['str16', 'uint32_t', 'uint32_t', 'void *']);
// VarDecFromStr(strIn, lcid, dwFlags, pdecOut)
// strIn : LPCWSTR -> 'str16'
// lcid : DWORD -> 'uint32_t'
// dwFlags : DWORD -> 'uint32_t'
// pdecOut : DECIMAL* 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", {
  VarDecFromStr: { parameters: ["buffer", "u32", "u32", "pointer"], result: "i32" },
});
// lib.symbols.VarDecFromStr(strIn, lcid, dwFlags, pdecOut)
// strIn : LPCWSTR -> "buffer"
// lcid : DWORD -> "u32"
// dwFlags : DWORD -> "u32"
// pdecOut : DECIMAL* 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 VarDecFromStr(
    const uint16_t* strIn,
    uint32_t lcid,
    uint32_t dwFlags,
    void* pdecOut);
C, "OLEAUT32.dll");
// $ffi->VarDecFromStr(strIn, lcid, dwFlags, pdecOut);
// strIn : LPCWSTR
// lcid : DWORD
// dwFlags : DWORD
// pdecOut : DECIMAL* 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 VarDecFromStr(
        WString strIn,   // LPCWSTR
        int lcid,   // DWORD
        int dwFlags,   // DWORD
        Pointer pdecOut   // DECIMAL* out
    );
}

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

{$mode objfpc}{$H+}
function VarDecFromStr(
  strIn: PWideChar;   // LPCWSTR
  lcid: DWORD;   // DWORD
  dwFlags: DWORD;   // DWORD
  pdecOut: Pointer   // DECIMAL* out
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'VarDecFromStr';

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

foreign import stdcall safe "VarDecFromStr"
  c_VarDecFromStr :: CWString -> Word32 -> Word32 -> Ptr () -> IO Int32
-- strIn : LPCWSTR -> CWString
-- lcid : DWORD -> Word32
-- dwFlags : DWORD -> Word32
-- pdecOut : DECIMAL* out -> 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 vardecfromstr =
  foreign "VarDecFromStr"
    ((ptr uint16_t) @-> uint32_t @-> uint32_t @-> (ptr void) @-> returning int32_t)
(* strIn : LPCWSTR -> (ptr uint16_t) *)
(* lcid : DWORD -> uint32_t *)
(* dwFlags : DWORD -> uint32_t *)
(* pdecOut : DECIMAL* out -> (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 ("VarDecFromStr" var-dec-from-str :convention :stdcall) :int32
  (str-in (:string :encoding :utf-16le))   ; LPCWSTR
  (lcid :uint32)   ; DWORD
  (dw-flags :uint32)   ; DWORD
  (pdec-out :pointer))   ; DECIMAL* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

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