OpenThemeData

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

HTHEME OpenThemeData(
    HWND hwnd,   // optional
    LPCWSTR pszClassList
);

<DllImport("UXTHEME.dll", ExactSpelling:=True)>
Public Shared Function OpenThemeData(
    hwnd As IntPtr,   ' HWND optional
    <MarshalAs(UnmanagedType.LPWStr)> pszClassList As String   ' LPCWSTR
) As IntPtr
End Function

' hwnd : HWND optional
' pszClassList : LPCWSTR
Declare PtrSafe Function OpenThemeData Lib "uxtheme" ( _
    ByVal hwnd As LongPtr, _
    ByVal pszClassList As LongPtr) As LongPtr
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OpenThemeData = ctypes.windll.uxtheme.OpenThemeData
OpenThemeData.restype = ctypes.c_ssize_t
OpenThemeData.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND optional
    wintypes.LPCWSTR,  # pszClassList : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('UXTHEME.dll')
OpenThemeData = Fiddle::Function.new(
  lib['OpenThemeData'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND optional
    Fiddle::TYPE_VOIDP,  # pszClassList : LPCWSTR
  ],
  Fiddle::TYPE_INTPTR_T)

#[link(name = "uxtheme")]
extern "system" {
    fn OpenThemeData(
        hwnd: *mut core::ffi::c_void,  // HWND optional
        pszClassList: *const u16  // LPCWSTR
    ) -> isize;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("UXTHEME.dll")]
public static extern IntPtr OpenThemeData(IntPtr hwnd, [MarshalAs(UnmanagedType.LPWStr)] string pszClassList);
"@
$api = Add-Type -MemberDefinition $sig -Name 'UXTHEME_OpenThemeData' -Namespace Win32 -PassThru
# $api::OpenThemeData(hwnd, pszClassList)

#uselib "UXTHEME.dll"
#func global OpenThemeData "OpenThemeData" sptr, sptr
; OpenThemeData hwnd, pszClassList   ; 戻り値は stat
; hwnd : HWND optional -> "sptr"
; pszClassList : LPCWSTR -> "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 "UXTHEME.dll"
#cfunc global OpenThemeData "OpenThemeData" sptr, wstr
; res = OpenThemeData(hwnd, pszClassList)
; hwnd : HWND optional -> "sptr"
; pszClassList : LPCWSTR -> "wstr"

; HTHEME OpenThemeData(HWND hwnd, LPCWSTR pszClassList)
#uselib "UXTHEME.dll"
#cfunc global OpenThemeData "OpenThemeData" intptr, wstr
; res = OpenThemeData(hwnd, pszClassList)
; hwnd : HWND optional -> "intptr"
; pszClassList : LPCWSTR -> "wstr"

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

var (
	uxtheme = windows.NewLazySystemDLL("UXTHEME.dll")
	procOpenThemeData = uxtheme.NewProc("OpenThemeData")
)

// hwnd (HWND optional), pszClassList (LPCWSTR)
r1, _, err := procOpenThemeData.Call(
	uintptr(hwnd),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszClassList))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HTHEME

function OpenThemeData(
  hwnd: THandle;   // HWND optional
  pszClassList: PWideChar   // LPCWSTR
): NativeInt; stdcall;
  external 'UXTHEME.dll' name 'OpenThemeData';

result := DllCall("UXTHEME\OpenThemeData"
    , "Ptr", hwnd   ; HWND optional
    , "WStr", pszClassList   ; LPCWSTR
    , "Ptr")   ; return: HTHEME

●OpenThemeData(hwnd, pszClassList) = DLL("UXTHEME.dll", "int OpenThemeData(void*, char*)")
# 呼び出し: OpenThemeData(hwnd, pszClassList)
# hwnd : HWND optional -> "void*"
# pszClassList : LPCWSTR -> "char*"
# 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 "uxtheme" fn OpenThemeData(
    hwnd: ?*anyopaque, // HWND optional
    pszClassList: [*c]const u16 // LPCWSTR
) callconv(std.os.windows.WINAPI) isize;

proc OpenThemeData(
    hwnd: pointer,  # HWND optional
    pszClassList: WideCString  # LPCWSTR
): int {.importc: "OpenThemeData", stdcall, dynlib: "UXTHEME.dll".}

pragma(lib, "uxtheme");
extern(Windows)
ptrdiff_t OpenThemeData(
    void* hwnd,   // HWND optional
    const(wchar)* pszClassList   // LPCWSTR
);

ccall((:OpenThemeData, "UXTHEME.dll"), stdcall, Int,
      (Ptr{Cvoid}, Cwstring),
      hwnd, pszClassList)
# hwnd : HWND optional -> Ptr{Cvoid}
# pszClassList : LPCWSTR -> Cwstring
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
intptr_t OpenThemeData(
    void* hwnd,
    const uint16_t* pszClassList);
]]
local uxtheme = ffi.load("uxtheme")
-- uxtheme.OpenThemeData(hwnd, pszClassList)
-- hwnd : HWND optional
-- pszClassList : LPCWSTR
-- 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('UXTHEME.dll');
const OpenThemeData = lib.func('__stdcall', 'OpenThemeData', 'intptr_t', ['void *', 'str16']);
// OpenThemeData(hwnd, pszClassList)
// hwnd : HWND optional -> 'void *'
// pszClassList : LPCWSTR -> 'str16'
// 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("UXTHEME.dll", {
  OpenThemeData: { parameters: ["pointer", "buffer"], result: "isize" },
});
// lib.symbols.OpenThemeData(hwnd, pszClassList)
// hwnd : HWND optional -> "pointer"
// pszClassList : LPCWSTR -> "buffer"
// 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
intptr_t OpenThemeData(
    void* hwnd,
    const uint16_t* pszClassList);
C, "UXTHEME.dll");
// $ffi->OpenThemeData(hwnd, pszClassList);
// hwnd : HWND optional
// pszClassList : LPCWSTR
// 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 Uxtheme extends StdCallLibrary {
    Uxtheme INSTANCE = Native.load("uxtheme", Uxtheme.class);
    long OpenThemeData(
        Pointer hwnd,   // HWND optional
        WString pszClassList   // LPCWSTR
    );
}

@[Link("uxtheme")]
lib LibUXTHEME
  fun OpenThemeData = OpenThemeData(
    hwnd : Void*,   # HWND optional
    pszClassList : UInt16*   # LPCWSTR
  ) : LibC::SSizeT
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 OpenThemeDataNative = IntPtr Function(Pointer<Void>, Pointer<Utf16>);
typedef OpenThemeDataDart = int Function(Pointer<Void>, Pointer<Utf16>);
final OpenThemeData = DynamicLibrary.open('UXTHEME.dll')
    .lookupFunction<OpenThemeDataNative, OpenThemeDataDart>('OpenThemeData');
// hwnd : HWND optional -> Pointer<Void>
// pszClassList : LPCWSTR -> Pointer<Utf16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function OpenThemeData(
  hwnd: THandle;   // HWND optional
  pszClassList: PWideChar   // LPCWSTR
): NativeInt; stdcall;
  external 'UXTHEME.dll' name 'OpenThemeData';

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

foreign import stdcall safe "OpenThemeData"
  c_OpenThemeData :: Ptr () -> CWString -> IO CIntPtr
-- hwnd : HWND optional -> Ptr ()
-- pszClassList : LPCWSTR -> CWString
-- 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 openthemedata =
  foreign "OpenThemeData"
    ((ptr void) @-> (ptr uint16_t) @-> returning intptr_t)
(* hwnd : HWND optional -> (ptr void) *)
(* pszClassList : LPCWSTR -> (ptr uint16_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 uxtheme (t "UXTHEME.dll"))
(cffi:use-foreign-library uxtheme)

(cffi:defcfun ("OpenThemeData" open-theme-data :convention :stdcall) :int64
  (hwnd :pointer)   ; HWND optional
  (psz-class-list (:string :encoding :utf-16le)))   ; LPCWSTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $OpenThemeData = Win32::API::More->new('UXTHEME',
    'LPARAM OpenThemeData(HANDLE hwnd, LPCWSTR pszClassList)');
# my $ret = $OpenThemeData->Call($hwnd, $pszClassList);
# hwnd : HWND optional -> HANDLE
# pszClassList : LPCWSTR -> LPCWSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。