PickIconDlg

// SHELL32.dll
#include <windows.h>

INT PickIconDlg(
    HWND hwnd,   // optional
    LPWSTR pszIconPath,
    DWORD cchIconPath,
    INT* piIconIndex   // optional
);

<DllImport("SHELL32.dll", ExactSpelling:=True)>
Public Shared Function PickIconDlg(
    hwnd As IntPtr,   ' HWND optional
    <MarshalAs(UnmanagedType.LPWStr)> pszIconPath As System.Text.StringBuilder,   ' LPWSTR in/out
    cchIconPath As UInteger,   ' DWORD
    piIconIndex As IntPtr   ' INT* optional, in/out
) As Integer
End Function

' hwnd : HWND optional
' pszIconPath : LPWSTR in/out
' cchIconPath : DWORD
' piIconIndex : INT* optional, in/out
Declare PtrSafe Function PickIconDlg Lib "shell32" ( _
    ByVal hwnd As LongPtr, _
    ByVal pszIconPath As LongPtr, _
    ByVal cchIconPath As Long, _
    ByVal piIconIndex 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

PickIconDlg = ctypes.windll.shell32.PickIconDlg
PickIconDlg.restype = ctypes.c_int
PickIconDlg.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND optional
    wintypes.LPWSTR,  # pszIconPath : LPWSTR in/out
    wintypes.DWORD,  # cchIconPath : DWORD
    ctypes.POINTER(ctypes.c_int),  # piIconIndex : INT* optional, in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHELL32.dll')
PickIconDlg = Fiddle::Function.new(
  lib['PickIconDlg'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND optional
    Fiddle::TYPE_VOIDP,  # pszIconPath : LPWSTR in/out
    -Fiddle::TYPE_INT,  # cchIconPath : DWORD
    Fiddle::TYPE_VOIDP,  # piIconIndex : INT* optional, in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "shell32")]
extern "system" {
    fn PickIconDlg(
        hwnd: *mut core::ffi::c_void,  // HWND optional
        pszIconPath: *mut u16,  // LPWSTR in/out
        cchIconPath: u32,  // DWORD
        piIconIndex: *mut i32  // INT* optional, in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHELL32.dll")]
public static extern int PickIconDlg(IntPtr hwnd, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pszIconPath, uint cchIconPath, IntPtr piIconIndex);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHELL32_PickIconDlg' -Namespace Win32 -PassThru
# $api::PickIconDlg(hwnd, pszIconPath, cchIconPath, piIconIndex)

#uselib "SHELL32.dll"
#func global PickIconDlg "PickIconDlg" sptr, sptr, sptr, sptr
; PickIconDlg hwnd, varptr(pszIconPath), cchIconPath, varptr(piIconIndex)   ; 戻り値は stat
; hwnd : HWND optional -> "sptr"
; pszIconPath : LPWSTR in/out -> "sptr"
; cchIconPath : DWORD -> "sptr"
; piIconIndex : INT* optional, in/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 (
	shell32 = windows.NewLazySystemDLL("SHELL32.dll")
	procPickIconDlg = shell32.NewProc("PickIconDlg")
)

// hwnd (HWND optional), pszIconPath (LPWSTR in/out), cchIconPath (DWORD), piIconIndex (INT* optional, in/out)
r1, _, err := procPickIconDlg.Call(
	uintptr(hwnd),
	uintptr(pszIconPath),
	uintptr(cchIconPath),
	uintptr(piIconIndex),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function PickIconDlg(
  hwnd: THandle;   // HWND optional
  pszIconPath: PWideChar;   // LPWSTR in/out
  cchIconPath: DWORD;   // DWORD
  piIconIndex: Pointer   // INT* optional, in/out
): Integer; stdcall;
  external 'SHELL32.dll' name 'PickIconDlg';

result := DllCall("SHELL32\PickIconDlg"
    , "Ptr", hwnd   ; HWND optional
    , "Ptr", pszIconPath   ; LPWSTR in/out
    , "UInt", cchIconPath   ; DWORD
    , "Ptr", piIconIndex   ; INT* optional, in/out
    , "Int")   ; return: INT

●PickIconDlg(hwnd, pszIconPath, cchIconPath, piIconIndex) = DLL("SHELL32.dll", "int PickIconDlg(void*, char*, dword, void*)")
# 呼び出し: PickIconDlg(hwnd, pszIconPath, cchIconPath, piIconIndex)
# hwnd : HWND optional -> "void*"
# pszIconPath : LPWSTR in/out -> "char*"
# cchIconPath : DWORD -> "dword"
# piIconIndex : INT* optional, in/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 "shell32" fn PickIconDlg(
    hwnd: ?*anyopaque, // HWND optional
    pszIconPath: [*c]u16, // LPWSTR in/out
    cchIconPath: u32, // DWORD
    piIconIndex: [*c]i32 // INT* optional, in/out
) callconv(std.os.windows.WINAPI) i32;

proc PickIconDlg(
    hwnd: pointer,  # HWND optional
    pszIconPath: ptr uint16,  # LPWSTR in/out
    cchIconPath: uint32,  # DWORD
    piIconIndex: ptr int32  # INT* optional, in/out
): int32 {.importc: "PickIconDlg", stdcall, dynlib: "SHELL32.dll".}

pragma(lib, "shell32");
extern(Windows)
int PickIconDlg(
    void* hwnd,   // HWND optional
    wchar* pszIconPath,   // LPWSTR in/out
    uint cchIconPath,   // DWORD
    int* piIconIndex   // INT* optional, in/out
);

ccall((:PickIconDlg, "SHELL32.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{UInt16}, UInt32, Ptr{Int32}),
      hwnd, pszIconPath, cchIconPath, piIconIndex)
# hwnd : HWND optional -> Ptr{Cvoid}
# pszIconPath : LPWSTR in/out -> Ptr{UInt16}
# cchIconPath : DWORD -> UInt32
# piIconIndex : INT* optional, in/out -> Ptr{Int32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t PickIconDlg(
    void* hwnd,
    uint16_t* pszIconPath,
    uint32_t cchIconPath,
    int32_t* piIconIndex);
]]
local shell32 = ffi.load("shell32")
-- shell32.PickIconDlg(hwnd, pszIconPath, cchIconPath, piIconIndex)
-- hwnd : HWND optional
-- pszIconPath : LPWSTR in/out
-- cchIconPath : DWORD
-- piIconIndex : INT* optional, in/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('SHELL32.dll');
const PickIconDlg = lib.func('__stdcall', 'PickIconDlg', 'int32_t', ['void *', 'uint16_t *', 'uint32_t', 'int32_t *']);
// PickIconDlg(hwnd, pszIconPath, cchIconPath, piIconIndex)
// hwnd : HWND optional -> 'void *'
// pszIconPath : LPWSTR in/out -> 'uint16_t *'
// cchIconPath : DWORD -> 'uint32_t'
// piIconIndex : INT* optional, in/out -> '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("SHELL32.dll", {
  PickIconDlg: { parameters: ["pointer", "buffer", "u32", "pointer"], result: "i32" },
});
// lib.symbols.PickIconDlg(hwnd, pszIconPath, cchIconPath, piIconIndex)
// hwnd : HWND optional -> "pointer"
// pszIconPath : LPWSTR in/out -> "buffer"
// cchIconPath : DWORD -> "u32"
// piIconIndex : INT* optional, in/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 PickIconDlg(
    void* hwnd,
    uint16_t* pszIconPath,
    uint32_t cchIconPath,
    int32_t* piIconIndex);
C, "SHELL32.dll");
// $ffi->PickIconDlg(hwnd, pszIconPath, cchIconPath, piIconIndex);
// hwnd : HWND optional
// pszIconPath : LPWSTR in/out
// cchIconPath : DWORD
// piIconIndex : INT* optional, in/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 Shell32 extends StdCallLibrary {
    Shell32 INSTANCE = Native.load("shell32", Shell32.class);
    int PickIconDlg(
        Pointer hwnd,   // HWND optional
        char[] pszIconPath,   // LPWSTR in/out
        int cchIconPath,   // DWORD
        IntByReference piIconIndex   // INT* optional, in/out
    );
}

@[Link("shell32")]
lib LibSHELL32
  fun PickIconDlg = PickIconDlg(
    hwnd : Void*,   # HWND optional
    pszIconPath : UInt16*,   # LPWSTR in/out
    cchIconPath : UInt32,   # DWORD
    piIconIndex : Int32*   # INT* optional, in/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 PickIconDlgNative = Int32 Function(Pointer<Void>, Pointer<Utf16>, Uint32, Pointer<Int32>);
typedef PickIconDlgDart = int Function(Pointer<Void>, Pointer<Utf16>, int, Pointer<Int32>);
final PickIconDlg = DynamicLibrary.open('SHELL32.dll')
    .lookupFunction<PickIconDlgNative, PickIconDlgDart>('PickIconDlg');
// hwnd : HWND optional -> Pointer<Void>
// pszIconPath : LPWSTR in/out -> Pointer<Utf16>
// cchIconPath : DWORD -> Uint32
// piIconIndex : INT* optional, in/out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function PickIconDlg(
  hwnd: THandle;   // HWND optional
  pszIconPath: PWideChar;   // LPWSTR in/out
  cchIconPath: DWORD;   // DWORD
  piIconIndex: Pointer   // INT* optional, in/out
): Integer; stdcall;
  external 'SHELL32.dll' name 'PickIconDlg';

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

foreign import stdcall safe "PickIconDlg"
  c_PickIconDlg :: Ptr () -> CWString -> Word32 -> Ptr Int32 -> IO Int32
-- hwnd : HWND optional -> Ptr ()
-- pszIconPath : LPWSTR in/out -> CWString
-- cchIconPath : DWORD -> Word32
-- piIconIndex : INT* optional, in/out -> Ptr Int32
-- 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 pickicondlg =
  foreign "PickIconDlg"
    ((ptr void) @-> (ptr uint16_t) @-> uint32_t @-> (ptr int32_t) @-> returning int32_t)
(* hwnd : HWND optional -> (ptr void) *)
(* pszIconPath : LPWSTR in/out -> (ptr uint16_t) *)
(* cchIconPath : DWORD -> uint32_t *)
(* piIconIndex : INT* optional, in/out -> (ptr 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 shell32 (t "SHELL32.dll"))
(cffi:use-foreign-library shell32)

(cffi:defcfun ("PickIconDlg" pick-icon-dlg :convention :stdcall) :int32
  (hwnd :pointer)   ; HWND optional
  (psz-icon-path :pointer)   ; LPWSTR in/out
  (cch-icon-path :uint32)   ; DWORD
  (pi-icon-index :pointer))   ; INT* optional, in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $PickIconDlg = Win32::API::More->new('SHELL32',
    'int PickIconDlg(HANDLE hwnd, LPWSTR pszIconPath, DWORD cchIconPath, LPVOID piIconIndex)');
# my $ret = $PickIconDlg->Call($hwnd, $pszIconPath, $cchIconPath, $piIconIndex);
# hwnd : HWND optional -> HANDLE
# pszIconPath : LPWSTR in/out -> LPWSTR
# cchIconPath : DWORD -> DWORD
# piIconIndex : INT* optional, in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。