OleGetIconOfFile

// OLE32.dll
#include <windows.h>

HGLOBAL OleGetIconOfFile(
    LPWSTR lpszPath,
    BOOL fUseFileAsLabel
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function OleGetIconOfFile(
    <MarshalAs(UnmanagedType.LPWStr)> lpszPath As String,   ' LPWSTR
    fUseFileAsLabel As Boolean   ' BOOL
) As IntPtr
End Function

' lpszPath : LPWSTR
' fUseFileAsLabel : BOOL
Declare PtrSafe Function OleGetIconOfFile Lib "ole32" ( _
    ByVal lpszPath As LongPtr, _
    ByVal fUseFileAsLabel As Long) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OleGetIconOfFile = ctypes.windll.ole32.OleGetIconOfFile
OleGetIconOfFile.restype = ctypes.c_void_p
OleGetIconOfFile.argtypes = [
    wintypes.LPCWSTR,  # lpszPath : LPWSTR
    wintypes.BOOL,  # fUseFileAsLabel : BOOL
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
OleGetIconOfFile = Fiddle::Function.new(
  lib['OleGetIconOfFile'],
  [
    Fiddle::TYPE_VOIDP,  # lpszPath : LPWSTR
    Fiddle::TYPE_INT,  # fUseFileAsLabel : BOOL
  ],
  Fiddle::TYPE_VOIDP)

#[link(name = "ole32")]
extern "system" {
    fn OleGetIconOfFile(
        lpszPath: *mut u16,  // LPWSTR
        fUseFileAsLabel: i32  // BOOL
    ) -> *mut core::ffi::c_void;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern IntPtr OleGetIconOfFile([MarshalAs(UnmanagedType.LPWStr)] string lpszPath, bool fUseFileAsLabel);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_OleGetIconOfFile' -Namespace Win32 -PassThru
# $api::OleGetIconOfFile(lpszPath, fUseFileAsLabel)

#uselib "OLE32.dll"
#func global OleGetIconOfFile "OleGetIconOfFile" sptr, sptr
; OleGetIconOfFile lpszPath, fUseFileAsLabel   ; 戻り値は stat
; lpszPath : LPWSTR -> "sptr"
; fUseFileAsLabel : BOOL -> "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。

#uselib "OLE32.dll"
#cfunc global OleGetIconOfFile "OleGetIconOfFile" wstr, int
; res = OleGetIconOfFile(lpszPath, fUseFileAsLabel)
; lpszPath : LPWSTR -> "wstr"
; fUseFileAsLabel : BOOL -> "int"

; HGLOBAL OleGetIconOfFile(LPWSTR lpszPath, BOOL fUseFileAsLabel)
#uselib "OLE32.dll"
#cfunc global OleGetIconOfFile "OleGetIconOfFile" wstr, int
; res = OleGetIconOfFile(lpszPath, fUseFileAsLabel)
; lpszPath : LPWSTR -> "wstr"
; fUseFileAsLabel : BOOL -> "int"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procOleGetIconOfFile = ole32.NewProc("OleGetIconOfFile")
)

// lpszPath (LPWSTR), fUseFileAsLabel (BOOL)
r1, _, err := procOleGetIconOfFile.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpszPath))),
	uintptr(fUseFileAsLabel),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HGLOBAL

function OleGetIconOfFile(
  lpszPath: PWideChar;   // LPWSTR
  fUseFileAsLabel: BOOL   // BOOL
): THandle; stdcall;
  external 'OLE32.dll' name 'OleGetIconOfFile';

result := DllCall("OLE32\OleGetIconOfFile"
    , "WStr", lpszPath   ; LPWSTR
    , "Int", fUseFileAsLabel   ; BOOL
    , "Ptr")   ; return: HGLOBAL

●OleGetIconOfFile(lpszPath, fUseFileAsLabel) = DLL("OLE32.dll", "void* OleGetIconOfFile(char*, bool)")
# 呼び出し: OleGetIconOfFile(lpszPath, fUseFileAsLabel)
# lpszPath : LPWSTR -> "char*"
# fUseFileAsLabel : BOOL -> "bool"
# 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 "ole32" fn OleGetIconOfFile(
    lpszPath: [*c]const u16, // LPWSTR
    fUseFileAsLabel: i32 // BOOL
) callconv(std.os.windows.WINAPI) ?*anyopaque;

proc OleGetIconOfFile(
    lpszPath: WideCString,  # LPWSTR
    fUseFileAsLabel: int32  # BOOL
): pointer {.importc: "OleGetIconOfFile", stdcall, dynlib: "OLE32.dll".}

pragma(lib, "ole32");
extern(Windows)
void* OleGetIconOfFile(
    const(wchar)* lpszPath,   // LPWSTR
    int fUseFileAsLabel   // BOOL
);

ccall((:OleGetIconOfFile, "OLE32.dll"), stdcall, Ptr{Cvoid},
      (Cwstring, Int32),
      lpszPath, fUseFileAsLabel)
# lpszPath : LPWSTR -> Cwstring
# fUseFileAsLabel : BOOL -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
void* OleGetIconOfFile(
    const uint16_t* lpszPath,
    int32_t fUseFileAsLabel);
]]
local ole32 = ffi.load("ole32")
-- ole32.OleGetIconOfFile(lpszPath, fUseFileAsLabel)
-- lpszPath : LPWSTR
-- fUseFileAsLabel : BOOL
-- 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('OLE32.dll');
const OleGetIconOfFile = lib.func('__stdcall', 'OleGetIconOfFile', 'void *', ['str16', 'int32_t']);
// OleGetIconOfFile(lpszPath, fUseFileAsLabel)
// lpszPath : LPWSTR -> 'str16'
// fUseFileAsLabel : BOOL -> 'int32_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("OLE32.dll", {
  OleGetIconOfFile: { parameters: ["buffer", "i32"], result: "pointer" },
});
// lib.symbols.OleGetIconOfFile(lpszPath, fUseFileAsLabel)
// lpszPath : LPWSTR -> "buffer"
// fUseFileAsLabel : BOOL -> "i32"
// 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
void* OleGetIconOfFile(
    const uint16_t* lpszPath,
    int32_t fUseFileAsLabel);
C, "OLE32.dll");
// $ffi->OleGetIconOfFile(lpszPath, fUseFileAsLabel);
// lpszPath : LPWSTR
// fUseFileAsLabel : BOOL
// 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 Ole32 extends StdCallLibrary {
    Ole32 INSTANCE = Native.load("ole32", Ole32.class);
    Pointer OleGetIconOfFile(
        WString lpszPath,   // LPWSTR
        boolean fUseFileAsLabel   // BOOL
    );
}

@[Link("ole32")]
lib LibOLE32
  fun OleGetIconOfFile = OleGetIconOfFile(
    lpszPath : UInt16*,   # LPWSTR
    fUseFileAsLabel : Int32   # BOOL
  ) : Void*
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 OleGetIconOfFileNative = Pointer<Void> Function(Pointer<Utf16>, Int32);
typedef OleGetIconOfFileDart = Pointer<Void> Function(Pointer<Utf16>, int);
final OleGetIconOfFile = DynamicLibrary.open('OLE32.dll')
    .lookupFunction<OleGetIconOfFileNative, OleGetIconOfFileDart>('OleGetIconOfFile');
// lpszPath : LPWSTR -> Pointer<Utf16>
// fUseFileAsLabel : BOOL -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function OleGetIconOfFile(
  lpszPath: PWideChar;   // LPWSTR
  fUseFileAsLabel: BOOL   // BOOL
): THandle; stdcall;
  external 'OLE32.dll' name 'OleGetIconOfFile';

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

foreign import stdcall safe "OleGetIconOfFile"
  c_OleGetIconOfFile :: CWString -> CInt -> IO (Ptr ())
-- lpszPath : LPWSTR -> CWString
-- fUseFileAsLabel : BOOL -> CInt
-- 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 olegeticonoffile =
  foreign "OleGetIconOfFile"
    ((ptr uint16_t) @-> int32_t @-> returning (ptr void))
(* lpszPath : LPWSTR -> (ptr uint16_t) *)
(* fUseFileAsLabel : BOOL -> int32_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 ole32 (t "OLE32.dll"))
(cffi:use-foreign-library ole32)

(cffi:defcfun ("OleGetIconOfFile" ole-get-icon-of-file :convention :stdcall) :pointer
  (lpsz-path (:string :encoding :utf-16le))   ; LPWSTR
  (f-use-file-as-label :int32))   ; BOOL
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $OleGetIconOfFile = Win32::API::More->new('OLE32',
    'HANDLE OleGetIconOfFile(LPCWSTR lpszPath, BOOL fUseFileAsLabel)');
# my $ret = $OleGetIconOfFile->Call($lpszPath, $fUseFileAsLabel);
# lpszPath : LPWSTR -> LPCWSTR
# fUseFileAsLabel : BOOL -> BOOL
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。