GdipLoadImageFromFile

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

Status GdipLoadImageFromFile(
    LPCWSTR filename,
    GpImage** image
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipLoadImageFromFile(
    <MarshalAs(UnmanagedType.LPWStr)> filename As String,   ' LPCWSTR
    image As IntPtr   ' GpImage** in/out
) As Integer
End Function

' filename : LPCWSTR
' image : GpImage** in/out
Declare PtrSafe Function GdipLoadImageFromFile Lib "gdiplus" ( _
    ByVal filename As LongPtr, _
    ByVal image 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

GdipLoadImageFromFile = ctypes.windll.gdiplus.GdipLoadImageFromFile
GdipLoadImageFromFile.restype = ctypes.c_int
GdipLoadImageFromFile.argtypes = [
    wintypes.LPCWSTR,  # filename : LPCWSTR
    ctypes.c_void_p,  # image : GpImage** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipLoadImageFromFile = Fiddle::Function.new(
  lib['GdipLoadImageFromFile'],
  [
    Fiddle::TYPE_VOIDP,  # filename : LPCWSTR
    Fiddle::TYPE_VOIDP,  # image : GpImage** in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipLoadImageFromFile(
        filename: *const u16,  // LPCWSTR
        image: *mut *mut GpImage  // GpImage** in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipLoadImageFromFile([MarshalAs(UnmanagedType.LPWStr)] string filename, IntPtr image);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipLoadImageFromFile' -Namespace Win32 -PassThru
# $api::GdipLoadImageFromFile(filename, image)

#uselib "gdiplus.dll"
#func global GdipLoadImageFromFile "GdipLoadImageFromFile" sptr, sptr
; GdipLoadImageFromFile filename, varptr(image)   ; 戻り値は stat
; filename : LPCWSTR -> "sptr"
; image : GpImage** 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 (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipLoadImageFromFile = gdiplus.NewProc("GdipLoadImageFromFile")
)

// filename (LPCWSTR), image (GpImage** in/out)
r1, _, err := procGdipLoadImageFromFile.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(filename))),
	uintptr(image),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipLoadImageFromFile(
  filename: PWideChar;   // LPCWSTR
  image: Pointer   // GpImage** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipLoadImageFromFile';

result := DllCall("gdiplus\GdipLoadImageFromFile"
    , "WStr", filename   ; LPCWSTR
    , "Ptr", image   ; GpImage** in/out
    , "Int")   ; return: Status

●GdipLoadImageFromFile(filename, image) = DLL("gdiplus.dll", "int GdipLoadImageFromFile(char*, void*)")
# 呼び出し: GdipLoadImageFromFile(filename, image)
# filename : LPCWSTR -> "char*"
# image : GpImage** 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 "gdiplus" fn GdipLoadImageFromFile(
    filename: [*c]const u16, // LPCWSTR
    image: [*c][*c]GpImage // GpImage** in/out
) callconv(std.os.windows.WINAPI) i32;

proc GdipLoadImageFromFile(
    filename: WideCString,  # LPCWSTR
    image: ptr GpImage  # GpImage** in/out
): int32 {.importc: "GdipLoadImageFromFile", stdcall, dynlib: "gdiplus.dll".}

pragma(lib, "gdiplus");
extern(Windows)
int GdipLoadImageFromFile(
    const(wchar)* filename,   // LPCWSTR
    GpImage** image   // GpImage** in/out
);

ccall((:GdipLoadImageFromFile, "gdiplus.dll"), stdcall, Int32,
      (Cwstring, Ptr{GpImage}),
      filename, image)
# filename : LPCWSTR -> Cwstring
# image : GpImage** in/out -> Ptr{GpImage}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t GdipLoadImageFromFile(
    const uint16_t* filename,
    void* image);
]]
local gdiplus = ffi.load("gdiplus")
-- gdiplus.GdipLoadImageFromFile(filename, image)
-- filename : LPCWSTR
-- image : GpImage** 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('gdiplus.dll');
const GdipLoadImageFromFile = lib.func('__stdcall', 'GdipLoadImageFromFile', 'int32_t', ['str16', 'void *']);
// GdipLoadImageFromFile(filename, image)
// filename : LPCWSTR -> 'str16'
// image : GpImage** in/out -> 'void *'
// 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("gdiplus.dll", {
  GdipLoadImageFromFile: { parameters: ["buffer", "pointer"], result: "i32" },
});
// lib.symbols.GdipLoadImageFromFile(filename, image)
// filename : LPCWSTR -> "buffer"
// image : GpImage** 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 GdipLoadImageFromFile(
    const uint16_t* filename,
    void* image);
C, "gdiplus.dll");
// $ffi->GdipLoadImageFromFile(filename, image);
// filename : LPCWSTR
// image : GpImage** 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 Gdiplus extends StdCallLibrary {
    Gdiplus INSTANCE = Native.load("gdiplus", Gdiplus.class);
    int GdipLoadImageFromFile(
        WString filename,   // LPCWSTR
        Pointer image   // GpImage** in/out
    );
}

@[Link("gdiplus")]
lib Libgdiplus
  fun GdipLoadImageFromFile = GdipLoadImageFromFile(
    filename : UInt16*,   # LPCWSTR
    image : GpImage**   # GpImage** 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 GdipLoadImageFromFileNative = Int32 Function(Pointer<Utf16>, Pointer<Void>);
typedef GdipLoadImageFromFileDart = int Function(Pointer<Utf16>, Pointer<Void>);
final GdipLoadImageFromFile = DynamicLibrary.open('gdiplus.dll')
    .lookupFunction<GdipLoadImageFromFileNative, GdipLoadImageFromFileDart>('GdipLoadImageFromFile');
// filename : LPCWSTR -> Pointer<Utf16>
// image : GpImage** in/out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GdipLoadImageFromFile(
  filename: PWideChar;   // LPCWSTR
  image: Pointer   // GpImage** in/out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipLoadImageFromFile';

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

foreign import stdcall safe "GdipLoadImageFromFile"
  c_GdipLoadImageFromFile :: CWString -> Ptr () -> IO Int32
-- filename : LPCWSTR -> CWString
-- image : GpImage** in/out -> Ptr ()
-- 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 gdiploadimagefromfile =
  foreign "GdipLoadImageFromFile"
    ((ptr uint16_t) @-> (ptr void) @-> returning int32_t)
(* filename : LPCWSTR -> (ptr uint16_t) *)
(* image : GpImage** in/out -> (ptr void) *)
(* 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 gdiplus (t "gdiplus.dll"))
(cffi:use-foreign-library gdiplus)

(cffi:defcfun ("GdipLoadImageFromFile" gdip-load-image-from-file :convention :stdcall) :int32
  (filename (:string :encoding :utf-16le))   ; LPCWSTR
  (image :pointer))   ; GpImage** in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GdipLoadImageFromFile = Win32::API::More->new('gdiplus',
    'int GdipLoadImageFromFile(LPCWSTR filename, LPVOID image)');
# my $ret = $GdipLoadImageFromFile->Call($filename, $image);
# filename : LPCWSTR -> LPCWSTR
# image : GpImage** 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。