OpenFile

// KERNEL32.dll
#include <windows.h>

INT OpenFile(
    LPCSTR lpFileName,
    OFSTRUCT* lpReOpenBuff,
    DWORD uStyle
);

<DllImport("KERNEL32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function OpenFile(
    <MarshalAs(UnmanagedType.LPStr)> lpFileName As String,   ' LPCSTR
    lpReOpenBuff As IntPtr,   ' OFSTRUCT* in/out
    uStyle As UInteger   ' DWORD
) As Integer
End Function

' lpFileName : LPCSTR
' lpReOpenBuff : OFSTRUCT* in/out
' uStyle : DWORD
Declare PtrSafe Function OpenFile Lib "kernel32" ( _
    ByVal lpFileName As String, _
    ByVal lpReOpenBuff As LongPtr, _
    ByVal uStyle As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OpenFile = ctypes.windll.kernel32.OpenFile
OpenFile.restype = ctypes.c_int
OpenFile.argtypes = [
    wintypes.LPCSTR,  # lpFileName : LPCSTR
    ctypes.c_void_p,  # lpReOpenBuff : OFSTRUCT* in/out
    wintypes.DWORD,  # uStyle : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('KERNEL32.dll')
OpenFile = Fiddle::Function.new(
  lib['OpenFile'],
  [
    Fiddle::TYPE_VOIDP,  # lpFileName : LPCSTR
    Fiddle::TYPE_VOIDP,  # lpReOpenBuff : OFSTRUCT* in/out
    -Fiddle::TYPE_INT,  # uStyle : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "kernel32")]
extern "system" {
    fn OpenFile(
        lpFileName: *const u8,  // LPCSTR
        lpReOpenBuff: *mut OFSTRUCT,  // OFSTRUCT* in/out
        uStyle: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("KERNEL32.dll", SetLastError = true)]
public static extern int OpenFile([MarshalAs(UnmanagedType.LPStr)] string lpFileName, IntPtr lpReOpenBuff, uint uStyle);
"@
$api = Add-Type -MemberDefinition $sig -Name 'KERNEL32_OpenFile' -Namespace Win32 -PassThru
# $api::OpenFile(lpFileName, lpReOpenBuff, uStyle)

#uselib "KERNEL32.dll"
#func global OpenFile "OpenFile" sptr, sptr, sptr
; OpenFile lpFileName, varptr(lpReOpenBuff), uStyle   ; 戻り値は stat
; lpFileName : LPCSTR -> "sptr"
; lpReOpenBuff : OFSTRUCT* in/out -> "sptr"
; uStyle : 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。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	kernel32 = windows.NewLazySystemDLL("KERNEL32.dll")
	procOpenFile = kernel32.NewProc("OpenFile")
)

// lpFileName (LPCSTR), lpReOpenBuff (OFSTRUCT* in/out), uStyle (DWORD)
r1, _, err := procOpenFile.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpFileName))),
	uintptr(lpReOpenBuff),
	uintptr(uStyle),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function OpenFile(
  lpFileName: PAnsiChar;   // LPCSTR
  lpReOpenBuff: Pointer;   // OFSTRUCT* in/out
  uStyle: DWORD   // DWORD
): Integer; stdcall;
  external 'KERNEL32.dll' name 'OpenFile';

result := DllCall("KERNEL32\OpenFile"
    , "AStr", lpFileName   ; LPCSTR
    , "Ptr", lpReOpenBuff   ; OFSTRUCT* in/out
    , "UInt", uStyle   ; DWORD
    , "Int")   ; return: INT

●OpenFile(lpFileName, lpReOpenBuff, uStyle) = DLL("KERNEL32.dll", "int OpenFile(char*, void*, dword)")
# 呼び出し: OpenFile(lpFileName, lpReOpenBuff, uStyle)
# lpFileName : LPCSTR -> "char*"
# lpReOpenBuff : OFSTRUCT* in/out -> "void*"
# uStyle : 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)。

const std = @import("std");

extern "kernel32" fn OpenFile(
    lpFileName: [*c]const u8, // LPCSTR
    lpReOpenBuff: [*c]OFSTRUCT, // OFSTRUCT* in/out
    uStyle: u32 // DWORD
) callconv(std.os.windows.WINAPI) i32;

proc OpenFile(
    lpFileName: cstring,  # LPCSTR
    lpReOpenBuff: ptr OFSTRUCT,  # OFSTRUCT* in/out
    uStyle: uint32  # DWORD
): int32 {.importc: "OpenFile", stdcall, dynlib: "KERNEL32.dll".}

pragma(lib, "kernel32");
extern(Windows)
int OpenFile(
    const(char)* lpFileName,   // LPCSTR
    OFSTRUCT* lpReOpenBuff,   // OFSTRUCT* in/out
    uint uStyle   // DWORD
);

ccall((:OpenFile, "KERNEL32.dll"), stdcall, Int32,
      (Cstring, Ptr{OFSTRUCT}, UInt32),
      lpFileName, lpReOpenBuff, uStyle)
# lpFileName : LPCSTR -> Cstring
# lpReOpenBuff : OFSTRUCT* in/out -> Ptr{OFSTRUCT}
# uStyle : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t OpenFile(
    const char* lpFileName,
    void* lpReOpenBuff,
    uint32_t uStyle);
]]
local kernel32 = ffi.load("kernel32")
-- kernel32.OpenFile(lpFileName, lpReOpenBuff, uStyle)
-- lpFileName : LPCSTR
-- lpReOpenBuff : OFSTRUCT* in/out
-- uStyle : DWORD
-- 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('KERNEL32.dll');
const OpenFile = lib.func('__stdcall', 'OpenFile', 'int32_t', ['str', 'void *', 'uint32_t']);
// OpenFile(lpFileName, lpReOpenBuff, uStyle)
// lpFileName : LPCSTR -> 'str'
// lpReOpenBuff : OFSTRUCT* in/out -> 'void *'
// uStyle : DWORD -> 'uint32_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("KERNEL32.dll", {
  OpenFile: { parameters: ["buffer", "pointer", "u32"], result: "i32" },
});
// lib.symbols.OpenFile(lpFileName, lpReOpenBuff, uStyle)
// lpFileName : LPCSTR -> "buffer"
// lpReOpenBuff : OFSTRUCT* in/out -> "pointer"
// uStyle : DWORD -> "u32"
// 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 OpenFile(
    const char* lpFileName,
    void* lpReOpenBuff,
    uint32_t uStyle);
C, "KERNEL32.dll");
// $ffi->OpenFile(lpFileName, lpReOpenBuff, uStyle);
// lpFileName : LPCSTR
// lpReOpenBuff : OFSTRUCT* in/out
// uStyle : DWORD
// 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 Kernel32 extends StdCallLibrary {
    Kernel32 INSTANCE = Native.load("kernel32", Kernel32.class);
    int OpenFile(
        String lpFileName,   // LPCSTR
        Pointer lpReOpenBuff,   // OFSTRUCT* in/out
        int uStyle   // DWORD
    );
}

@[Link("kernel32")]
lib LibKERNEL32
  fun OpenFile = OpenFile(
    lpFileName : UInt8*,   # LPCSTR
    lpReOpenBuff : OFSTRUCT*,   # OFSTRUCT* in/out
    uStyle : UInt32   # DWORD
  ) : 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 OpenFileNative = Int32 Function(Pointer<Utf8>, Pointer<Void>, Uint32);
typedef OpenFileDart = int Function(Pointer<Utf8>, Pointer<Void>, int);
final OpenFile = DynamicLibrary.open('KERNEL32.dll')
    .lookupFunction<OpenFileNative, OpenFileDart>('OpenFile');
// lpFileName : LPCSTR -> Pointer<Utf8>
// lpReOpenBuff : OFSTRUCT* in/out -> Pointer<Void>
// uStyle : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function OpenFile(
  lpFileName: PAnsiChar;   // LPCSTR
  lpReOpenBuff: Pointer;   // OFSTRUCT* in/out
  uStyle: DWORD   // DWORD
): Integer; stdcall;
  external 'KERNEL32.dll' name 'OpenFile';

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

foreign import stdcall safe "OpenFile"
  c_OpenFile :: CString -> Ptr () -> Word32 -> IO Int32
-- lpFileName : LPCSTR -> CString
-- lpReOpenBuff : OFSTRUCT* in/out -> Ptr ()
-- uStyle : DWORD -> Word32
-- 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 openfile =
  foreign "OpenFile"
    (string @-> (ptr void) @-> uint32_t @-> returning int32_t)
(* lpFileName : LPCSTR -> string *)
(* lpReOpenBuff : OFSTRUCT* in/out -> (ptr void) *)
(* uStyle : DWORD -> uint32_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 kernel32 (t "KERNEL32.dll"))
(cffi:use-foreign-library kernel32)

(cffi:defcfun ("OpenFile" open-file :convention :stdcall) :int32
  (lp-file-name :string)   ; LPCSTR
  (lp-re-open-buff :pointer)   ; OFSTRUCT* in/out
  (u-style :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $OpenFile = Win32::API::More->new('KERNEL32',
    'int OpenFile(LPCSTR lpFileName, LPVOID lpReOpenBuff, DWORD uStyle)');
# my $ret = $OpenFile->Call($lpFileName, $lpReOpenBuff, $uStyle);
# lpFileName : LPCSTR -> LPCSTR
# lpReOpenBuff : OFSTRUCT* in/out -> LPVOID
# uStyle : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。