SHDefExtractIconA

// SHELL32.dll  (ANSI / -A)
#include <windows.h>

HRESULT SHDefExtractIconA(
    LPCSTR pszIconFile,
    INT iIndex,
    DWORD uFlags,
    HICON* phiconLarge,   // optional
    HICON* phiconSmall,   // optional
    DWORD nIconSize
);

<DllImport("SHELL32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function SHDefExtractIconA(
    <MarshalAs(UnmanagedType.LPStr)> pszIconFile As String,   ' LPCSTR
    iIndex As Integer,   ' INT
    uFlags As UInteger,   ' DWORD
    phiconLarge As IntPtr,   ' HICON* optional, out
    phiconSmall As IntPtr,   ' HICON* optional, out
    nIconSize As UInteger   ' DWORD
) As Integer
End Function

' pszIconFile : LPCSTR
' iIndex : INT
' uFlags : DWORD
' phiconLarge : HICON* optional, out
' phiconSmall : HICON* optional, out
' nIconSize : DWORD
Declare PtrSafe Function SHDefExtractIconA Lib "shell32" ( _
    ByVal pszIconFile As String, _
    ByVal iIndex As Long, _
    ByVal uFlags As Long, _
    ByVal phiconLarge As LongPtr, _
    ByVal phiconSmall As LongPtr, _
    ByVal nIconSize 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

SHDefExtractIconA = ctypes.windll.shell32.SHDefExtractIconA
SHDefExtractIconA.restype = ctypes.c_int
SHDefExtractIconA.argtypes = [
    wintypes.LPCSTR,  # pszIconFile : LPCSTR
    ctypes.c_int,  # iIndex : INT
    wintypes.DWORD,  # uFlags : DWORD
    ctypes.c_void_p,  # phiconLarge : HICON* optional, out
    ctypes.c_void_p,  # phiconSmall : HICON* optional, out
    wintypes.DWORD,  # nIconSize : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
SHDefExtractIconA = Fiddle::Function.new(
  lib['SHDefExtractIconA'],
  [
    Fiddle::TYPE_VOIDP,  # pszIconFile : LPCSTR
    Fiddle::TYPE_INT,  # iIndex : INT
    -Fiddle::TYPE_INT,  # uFlags : DWORD
    Fiddle::TYPE_VOIDP,  # phiconLarge : HICON* optional, out
    Fiddle::TYPE_VOIDP,  # phiconSmall : HICON* optional, out
    -Fiddle::TYPE_INT,  # nIconSize : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn SHDefExtractIconA(
        pszIconFile: *const u8,  // LPCSTR
        iIndex: i32,  // INT
        uFlags: u32,  // DWORD
        phiconLarge: *mut *mut core::ffi::c_void,  // HICON* optional, out
        phiconSmall: *mut *mut core::ffi::c_void,  // HICON* optional, out
        nIconSize: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll", CharSet = CharSet.Ansi)]
public static extern int SHDefExtractIconA([MarshalAs(UnmanagedType.LPStr)] string pszIconFile, int iIndex, uint uFlags, IntPtr phiconLarge, IntPtr phiconSmall, uint nIconSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_SHDefExtractIconA' -Namespace Win32 -PassThru
# $api::SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)

#uselib "SHELL32.dll"
#func global SHDefExtractIconA "SHDefExtractIconA" sptr, sptr, sptr, sptr, sptr, sptr
; SHDefExtractIconA pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize   ; 戻り値は stat
; pszIconFile : LPCSTR -> "sptr"
; iIndex : INT -> "sptr"
; uFlags : DWORD -> "sptr"
; phiconLarge : HICON* optional, out -> "sptr"
; phiconSmall : HICON* optional, out -> "sptr"
; nIconSize : 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。

#uselib "SHELL32.dll"
#cfunc global SHDefExtractIconA "SHDefExtractIconA" str, int, int, sptr, sptr, int
; res = SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)
; pszIconFile : LPCSTR -> "str"
; iIndex : INT -> "int"
; uFlags : DWORD -> "int"
; phiconLarge : HICON* optional, out -> "sptr"
; phiconSmall : HICON* optional, out -> "sptr"
; nIconSize : DWORD -> "int"

; HRESULT SHDefExtractIconA(LPCSTR pszIconFile, INT iIndex, DWORD uFlags, HICON* phiconLarge, HICON* phiconSmall, DWORD nIconSize)
#uselib "SHELL32.dll"
#cfunc global SHDefExtractIconA "SHDefExtractIconA" str, int, int, intptr, intptr, int
; res = SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)
; pszIconFile : LPCSTR -> "str"
; iIndex : INT -> "int"
; uFlags : DWORD -> "int"
; phiconLarge : HICON* optional, out -> "intptr"
; phiconSmall : HICON* optional, out -> "intptr"
; nIconSize : DWORD -> "int"

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

var (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procSHDefExtractIconA = shell32.NewProc("SHDefExtractIconA")
)

// pszIconFile (LPCSTR), iIndex (INT), uFlags (DWORD), phiconLarge (HICON* optional, out), phiconSmall (HICON* optional, out), nIconSize (DWORD)
r1, _, err := procSHDefExtractIconA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(pszIconFile))),
	uintptr(iIndex),
	uintptr(uFlags),
	uintptr(phiconLarge),
	uintptr(phiconSmall),
	uintptr(nIconSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function SHDefExtractIconA(
  pszIconFile: PAnsiChar;   // LPCSTR
  iIndex: Integer;   // INT
  uFlags: DWORD;   // DWORD
  phiconLarge: Pointer;   // HICON* optional, out
  phiconSmall: Pointer;   // HICON* optional, out
  nIconSize: DWORD   // DWORD
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHDefExtractIconA';

result := DllCall("SHELL32\SHDefExtractIconA"
    , "AStr", pszIconFile   ; LPCSTR
    , "Int", iIndex   ; INT
    , "UInt", uFlags   ; DWORD
    , "Ptr", phiconLarge   ; HICON* optional, out
    , "Ptr", phiconSmall   ; HICON* optional, out
    , "UInt", nIconSize   ; DWORD
    , "Int")   ; return: HRESULT

●SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize) = DLL("SHELL32.dll", "int SHDefExtractIconA(char*, int, dword, void*, void*, dword)")
# 呼び出し: SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)
# pszIconFile : LPCSTR -> "char*"
# iIndex : INT -> "int"
# uFlags : DWORD -> "dword"
# phiconLarge : HICON* optional, out -> "void*"
# phiconSmall : HICON* optional, out -> "void*"
# nIconSize : 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 "shell32" fn SHDefExtractIconA(
    pszIconFile: [*c]const u8, // LPCSTR
    iIndex: i32, // INT
    uFlags: u32, // DWORD
    phiconLarge: ?*anyopaque, // HICON* optional, out
    phiconSmall: ?*anyopaque, // HICON* optional, out
    nIconSize: u32 // DWORD
) callconv(std.os.windows.WINAPI) i32;

proc SHDefExtractIconA(
    pszIconFile: cstring,  # LPCSTR
    iIndex: int32,  # INT
    uFlags: uint32,  # DWORD
    phiconLarge: pointer,  # HICON* optional, out
    phiconSmall: pointer,  # HICON* optional, out
    nIconSize: uint32  # DWORD
): int32 {.importc: "SHDefExtractIconA", stdcall, dynlib: "SHELL32.dll".}

pragma(lib, "shell32");
extern(Windows)
int SHDefExtractIconA(
    const(char)* pszIconFile,   // LPCSTR
    int iIndex,   // INT
    uint uFlags,   // DWORD
    void* phiconLarge,   // HICON* optional, out
    void* phiconSmall,   // HICON* optional, out
    uint nIconSize   // DWORD
);

ccall((:SHDefExtractIconA, "SHELL32.dll"), stdcall, Int32,
      (Cstring, Int32, UInt32, Ptr{Cvoid}, Ptr{Cvoid}, UInt32),
      pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)
# pszIconFile : LPCSTR -> Cstring
# iIndex : INT -> Int32
# uFlags : DWORD -> UInt32
# phiconLarge : HICON* optional, out -> Ptr{Cvoid}
# phiconSmall : HICON* optional, out -> Ptr{Cvoid}
# nIconSize : 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 SHDefExtractIconA(
    const char* pszIconFile,
    int32_t iIndex,
    uint32_t uFlags,
    void* phiconLarge,
    void* phiconSmall,
    uint32_t nIconSize);
]]
local shell32 = ffi.load("shell32")
-- shell32.SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)
-- pszIconFile : LPCSTR
-- iIndex : INT
-- uFlags : DWORD
-- phiconLarge : HICON* optional, out
-- phiconSmall : HICON* optional, out
-- nIconSize : 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('SHELL32.dll');
const SHDefExtractIconA = lib.func('__stdcall', 'SHDefExtractIconA', 'int32_t', ['str', 'int32_t', 'uint32_t', 'void *', 'void *', 'uint32_t']);
// SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)
// pszIconFile : LPCSTR -> 'str'
// iIndex : INT -> 'int32_t'
// uFlags : DWORD -> 'uint32_t'
// phiconLarge : HICON* optional, out -> 'void *'
// phiconSmall : HICON* optional, out -> 'void *'
// nIconSize : 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("SHELL32.dll", {
  SHDefExtractIconA: { parameters: ["buffer", "i32", "u32", "pointer", "pointer", "u32"], result: "i32" },
});
// lib.symbols.SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize)
// pszIconFile : LPCSTR -> "buffer"
// iIndex : INT -> "i32"
// uFlags : DWORD -> "u32"
// phiconLarge : HICON* optional, out -> "pointer"
// phiconSmall : HICON* optional, out -> "pointer"
// nIconSize : DWORD -> "u32"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t SHDefExtractIconA(
    const char* pszIconFile,
    int32_t iIndex,
    uint32_t uFlags,
    void* phiconLarge,
    void* phiconSmall,
    uint32_t nIconSize);
C, "SHELL32.dll");
// $ffi->SHDefExtractIconA(pszIconFile, iIndex, uFlags, phiconLarge, phiconSmall, nIconSize);
// pszIconFile : LPCSTR
// iIndex : INT
// uFlags : DWORD
// phiconLarge : HICON* optional, out
// phiconSmall : HICON* optional, out
// nIconSize : 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 Shell32 extends StdCallLibrary {
    Shell32 INSTANCE = Native.load("shell32", Shell32.class, W32APIOptions.ASCII_OPTIONS);
    int SHDefExtractIconA(
        String pszIconFile,   // LPCSTR
        int iIndex,   // INT
        int uFlags,   // DWORD
        Pointer phiconLarge,   // HICON* optional, out
        Pointer phiconSmall,   // HICON* optional, out
        int nIconSize   // DWORD
    );
}

@[Link("shell32")]
lib LibSHELL32
  fun SHDefExtractIconA = SHDefExtractIconA(
    pszIconFile : UInt8*,   # LPCSTR
    iIndex : Int32,   # INT
    uFlags : UInt32,   # DWORD
    phiconLarge : Void*,   # HICON* optional, out
    phiconSmall : Void*,   # HICON* optional, out
    nIconSize : 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 SHDefExtractIconANative = Int32 Function(Pointer<Utf8>, Int32, Uint32, Pointer<Void>, Pointer<Void>, Uint32);
typedef SHDefExtractIconADart = int Function(Pointer<Utf8>, int, int, Pointer<Void>, Pointer<Void>, int);
final SHDefExtractIconA = DynamicLibrary.open('SHELL32.dll')
    .lookupFunction<SHDefExtractIconANative, SHDefExtractIconADart>('SHDefExtractIconA');
// pszIconFile : LPCSTR -> Pointer<Utf8>
// iIndex : INT -> Int32
// uFlags : DWORD -> Uint32
// phiconLarge : HICON* optional, out -> Pointer<Void>
// phiconSmall : HICON* optional, out -> Pointer<Void>
// nIconSize : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function SHDefExtractIconA(
  pszIconFile: PAnsiChar;   // LPCSTR
  iIndex: Integer;   // INT
  uFlags: DWORD;   // DWORD
  phiconLarge: Pointer;   // HICON* optional, out
  phiconSmall: Pointer;   // HICON* optional, out
  nIconSize: DWORD   // DWORD
): Integer; stdcall;
  external 'SHELL32.dll' name 'SHDefExtractIconA';

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

foreign import stdcall safe "SHDefExtractIconA"
  c_SHDefExtractIconA :: CString -> Int32 -> Word32 -> Ptr () -> Ptr () -> Word32 -> IO Int32
-- pszIconFile : LPCSTR -> CString
-- iIndex : INT -> Int32
-- uFlags : DWORD -> Word32
-- phiconLarge : HICON* optional, out -> Ptr ()
-- phiconSmall : HICON* optional, out -> Ptr ()
-- nIconSize : 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 shdefextracticona =
  foreign "SHDefExtractIconA"
    (string @-> int32_t @-> uint32_t @-> (ptr void) @-> (ptr void) @-> uint32_t @-> returning int32_t)
(* pszIconFile : LPCSTR -> string *)
(* iIndex : INT -> int32_t *)
(* uFlags : DWORD -> uint32_t *)
(* phiconLarge : HICON* optional, out -> (ptr void) *)
(* phiconSmall : HICON* optional, out -> (ptr void) *)
(* nIconSize : 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 shell32 (t "SHELL32.dll"))
(cffi:use-foreign-library shell32)

(cffi:defcfun ("SHDefExtractIconA" shdef-extract-icon-a :convention :stdcall) :int32
  (psz-icon-file :string)   ; LPCSTR
  (i-index :int32)   ; INT
  (u-flags :uint32)   ; DWORD
  (phicon-large :pointer)   ; HICON* optional, out
  (phicon-small :pointer)   ; HICON* optional, out
  (n-icon-size :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $SHDefExtractIconA = Win32::API::More->new('SHELL32',
    'int SHDefExtractIconA(LPCSTR pszIconFile, int iIndex, DWORD uFlags, HANDLE phiconLarge, HANDLE phiconSmall, DWORD nIconSize)');
# my $ret = $SHDefExtractIconA->Call($pszIconFile, $iIndex, $uFlags, $phiconLarge, $phiconSmall, $nIconSize);
# pszIconFile : LPCSTR -> LPCSTR
# iIndex : INT -> int
# uFlags : DWORD -> DWORD
# phiconLarge : HICON* optional, out -> HANDLE
# phiconSmall : HICON* optional, out -> HANDLE
# nIconSize : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。