DecodeImageEx

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

HRESULT DecodeImageEx(
    IStream* pStream,
    IMapMIMEToCLSID* pMap,
    IUnknown* pEventSink,
    LPCWSTR pszMIMETypeParam
);

<DllImport("ImgUtil.dll", ExactSpelling:=True)>
Public Shared Function DecodeImageEx(
    pStream As IntPtr,   ' IStream*
    pMap As IntPtr,   ' IMapMIMEToCLSID*
    pEventSink As IntPtr,   ' IUnknown*
    <MarshalAs(UnmanagedType.LPWStr)> pszMIMETypeParam As String   ' LPCWSTR
) As Integer
End Function

' pStream : IStream*
' pMap : IMapMIMEToCLSID*
' pEventSink : IUnknown*
' pszMIMETypeParam : LPCWSTR
Declare PtrSafe Function DecodeImageEx Lib "imgutil" ( _
    ByVal pStream As LongPtr, _
    ByVal pMap As LongPtr, _
    ByVal pEventSink As LongPtr, _
    ByVal pszMIMETypeParam 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

DecodeImageEx = ctypes.windll.imgutil.DecodeImageEx
DecodeImageEx.restype = ctypes.c_int
DecodeImageEx.argtypes = [
    ctypes.c_void_p,  # pStream : IStream*
    ctypes.c_void_p,  # pMap : IMapMIMEToCLSID*
    ctypes.c_void_p,  # pEventSink : IUnknown*
    wintypes.LPCWSTR,  # pszMIMETypeParam : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ImgUtil.dll')
DecodeImageEx = Fiddle::Function.new(
  lib['DecodeImageEx'],
  [
    Fiddle::TYPE_VOIDP,  # pStream : IStream*
    Fiddle::TYPE_VOIDP,  # pMap : IMapMIMEToCLSID*
    Fiddle::TYPE_VOIDP,  # pEventSink : IUnknown*
    Fiddle::TYPE_VOIDP,  # pszMIMETypeParam : LPCWSTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "imgutil")]
extern "system" {
    fn DecodeImageEx(
        pStream: *mut core::ffi::c_void,  // IStream*
        pMap: *mut core::ffi::c_void,  // IMapMIMEToCLSID*
        pEventSink: *mut core::ffi::c_void,  // IUnknown*
        pszMIMETypeParam: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ImgUtil.dll")]
public static extern int DecodeImageEx(IntPtr pStream, IntPtr pMap, IntPtr pEventSink, [MarshalAs(UnmanagedType.LPWStr)] string pszMIMETypeParam);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ImgUtil_DecodeImageEx' -Namespace Win32 -PassThru
# $api::DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam)

#uselib "ImgUtil.dll"
#func global DecodeImageEx "DecodeImageEx" sptr, sptr, sptr, sptr
; DecodeImageEx pStream, pMap, pEventSink, pszMIMETypeParam   ; 戻り値は stat
; pStream : IStream* -> "sptr"
; pMap : IMapMIMEToCLSID* -> "sptr"
; pEventSink : IUnknown* -> "sptr"
; pszMIMETypeParam : 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 "ImgUtil.dll"
#cfunc global DecodeImageEx "DecodeImageEx" sptr, sptr, sptr, wstr
; res = DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam)
; pStream : IStream* -> "sptr"
; pMap : IMapMIMEToCLSID* -> "sptr"
; pEventSink : IUnknown* -> "sptr"
; pszMIMETypeParam : LPCWSTR -> "wstr"

; HRESULT DecodeImageEx(IStream* pStream, IMapMIMEToCLSID* pMap, IUnknown* pEventSink, LPCWSTR pszMIMETypeParam)
#uselib "ImgUtil.dll"
#cfunc global DecodeImageEx "DecodeImageEx" intptr, intptr, intptr, wstr
; res = DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam)
; pStream : IStream* -> "intptr"
; pMap : IMapMIMEToCLSID* -> "intptr"
; pEventSink : IUnknown* -> "intptr"
; pszMIMETypeParam : LPCWSTR -> "wstr"

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

var (
	imgutil = windows.NewLazySystemDLL("ImgUtil.dll")
	procDecodeImageEx = imgutil.NewProc("DecodeImageEx")
)

// pStream (IStream*), pMap (IMapMIMEToCLSID*), pEventSink (IUnknown*), pszMIMETypeParam (LPCWSTR)
r1, _, err := procDecodeImageEx.Call(
	uintptr(pStream),
	uintptr(pMap),
	uintptr(pEventSink),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszMIMETypeParam))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function DecodeImageEx(
  pStream: Pointer;   // IStream*
  pMap: Pointer;   // IMapMIMEToCLSID*
  pEventSink: Pointer;   // IUnknown*
  pszMIMETypeParam: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'ImgUtil.dll' name 'DecodeImageEx';

result := DllCall("ImgUtil\DecodeImageEx"
    , "Ptr", pStream   ; IStream*
    , "Ptr", pMap   ; IMapMIMEToCLSID*
    , "Ptr", pEventSink   ; IUnknown*
    , "WStr", pszMIMETypeParam   ; LPCWSTR
    , "Int")   ; return: HRESULT

●DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam) = DLL("ImgUtil.dll", "int DecodeImageEx(void*, void*, void*, char*)")
# 呼び出し: DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam)
# pStream : IStream* -> "void*"
# pMap : IMapMIMEToCLSID* -> "void*"
# pEventSink : IUnknown* -> "void*"
# pszMIMETypeParam : 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 "imgutil" fn DecodeImageEx(
    pStream: ?*anyopaque, // IStream*
    pMap: ?*anyopaque, // IMapMIMEToCLSID*
    pEventSink: ?*anyopaque, // IUnknown*
    pszMIMETypeParam: [*c]const u16 // LPCWSTR
) callconv(std.os.windows.WINAPI) i32;

proc DecodeImageEx(
    pStream: pointer,  # IStream*
    pMap: pointer,  # IMapMIMEToCLSID*
    pEventSink: pointer,  # IUnknown*
    pszMIMETypeParam: WideCString  # LPCWSTR
): int32 {.importc: "DecodeImageEx", stdcall, dynlib: "ImgUtil.dll".}

pragma(lib, "imgutil");
extern(Windows)
int DecodeImageEx(
    void* pStream,   // IStream*
    void* pMap,   // IMapMIMEToCLSID*
    void* pEventSink,   // IUnknown*
    const(wchar)* pszMIMETypeParam   // LPCWSTR
);

ccall((:DecodeImageEx, "ImgUtil.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Ptr{Cvoid}, Ptr{Cvoid}, Cwstring),
      pStream, pMap, pEventSink, pszMIMETypeParam)
# pStream : IStream* -> Ptr{Cvoid}
# pMap : IMapMIMEToCLSID* -> Ptr{Cvoid}
# pEventSink : IUnknown* -> Ptr{Cvoid}
# pszMIMETypeParam : LPCWSTR -> Cwstring
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t DecodeImageEx(
    void* pStream,
    void* pMap,
    void* pEventSink,
    const uint16_t* pszMIMETypeParam);
]]
local imgutil = ffi.load("imgutil")
-- imgutil.DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam)
-- pStream : IStream*
-- pMap : IMapMIMEToCLSID*
-- pEventSink : IUnknown*
-- pszMIMETypeParam : 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('ImgUtil.dll');
const DecodeImageEx = lib.func('__stdcall', 'DecodeImageEx', 'int32_t', ['void *', 'void *', 'void *', 'str16']);
// DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam)
// pStream : IStream* -> 'void *'
// pMap : IMapMIMEToCLSID* -> 'void *'
// pEventSink : IUnknown* -> 'void *'
// pszMIMETypeParam : 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("ImgUtil.dll", {
  DecodeImageEx: { parameters: ["pointer", "pointer", "pointer", "buffer"], result: "i32" },
});
// lib.symbols.DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam)
// pStream : IStream* -> "pointer"
// pMap : IMapMIMEToCLSID* -> "pointer"
// pEventSink : IUnknown* -> "pointer"
// pszMIMETypeParam : 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
int32_t DecodeImageEx(
    void* pStream,
    void* pMap,
    void* pEventSink,
    const uint16_t* pszMIMETypeParam);
C, "ImgUtil.dll");
// $ffi->DecodeImageEx(pStream, pMap, pEventSink, pszMIMETypeParam);
// pStream : IStream*
// pMap : IMapMIMEToCLSID*
// pEventSink : IUnknown*
// pszMIMETypeParam : 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 Imgutil extends StdCallLibrary {
    Imgutil INSTANCE = Native.load("imgutil", Imgutil.class);
    int DecodeImageEx(
        Pointer pStream,   // IStream*
        Pointer pMap,   // IMapMIMEToCLSID*
        Pointer pEventSink,   // IUnknown*
        WString pszMIMETypeParam   // LPCWSTR
    );
}

@[Link("imgutil")]
lib LibImgUtil
  fun DecodeImageEx = DecodeImageEx(
    pStream : Void*,   # IStream*
    pMap : Void*,   # IMapMIMEToCLSID*
    pEventSink : Void*,   # IUnknown*
    pszMIMETypeParam : UInt16*   # LPCWSTR
  ) : 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 DecodeImageExNative = Int32 Function(Pointer<Void>, Pointer<Void>, Pointer<Void>, Pointer<Utf16>);
typedef DecodeImageExDart = int Function(Pointer<Void>, Pointer<Void>, Pointer<Void>, Pointer<Utf16>);
final DecodeImageEx = DynamicLibrary.open('ImgUtil.dll')
    .lookupFunction<DecodeImageExNative, DecodeImageExDart>('DecodeImageEx');
// pStream : IStream* -> Pointer<Void>
// pMap : IMapMIMEToCLSID* -> Pointer<Void>
// pEventSink : IUnknown* -> Pointer<Void>
// pszMIMETypeParam : LPCWSTR -> Pointer<Utf16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DecodeImageEx(
  pStream: Pointer;   // IStream*
  pMap: Pointer;   // IMapMIMEToCLSID*
  pEventSink: Pointer;   // IUnknown*
  pszMIMETypeParam: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'ImgUtil.dll' name 'DecodeImageEx';

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

foreign import stdcall safe "DecodeImageEx"
  c_DecodeImageEx :: Ptr () -> Ptr () -> Ptr () -> CWString -> IO Int32
-- pStream : IStream* -> Ptr ()
-- pMap : IMapMIMEToCLSID* -> Ptr ()
-- pEventSink : IUnknown* -> Ptr ()
-- pszMIMETypeParam : 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 decodeimageex =
  foreign "DecodeImageEx"
    ((ptr void) @-> (ptr void) @-> (ptr void) @-> (ptr uint16_t) @-> returning int32_t)
(* pStream : IStream* -> (ptr void) *)
(* pMap : IMapMIMEToCLSID* -> (ptr void) *)
(* pEventSink : IUnknown* -> (ptr void) *)
(* pszMIMETypeParam : 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 imgutil (t "ImgUtil.dll"))
(cffi:use-foreign-library imgutil)

(cffi:defcfun ("DecodeImageEx" decode-image-ex :convention :stdcall) :int32
  (p-stream :pointer)   ; IStream*
  (p-map :pointer)   ; IMapMIMEToCLSID*
  (p-event-sink :pointer)   ; IUnknown*
  (psz-mimetype-param (: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 $DecodeImageEx = Win32::API::More->new('ImgUtil',
    'int DecodeImageEx(LPVOID pStream, LPVOID pMap, LPVOID pEventSink, LPCWSTR pszMIMETypeParam)');
# my $ret = $DecodeImageEx->Call($pStream, $pMap, $pEventSink, $pszMIMETypeParam);
# pStream : IStream* -> LPVOID
# pMap : IMapMIMEToCLSID* -> LPVOID
# pEventSink : IUnknown* -> LPVOID
# pszMIMETypeParam : LPCWSTR -> LPCWSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。