GdipGetImageDecodersSize

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

Status GdipGetImageDecodersSize(
    DWORD* numDecoders,
    DWORD* size
);

<DllImport("gdiplus.dll", ExactSpelling:=True)>
Public Shared Function GdipGetImageDecodersSize(
    <Out> ByRef numDecoders As UInteger,   ' DWORD* out
    <Out> ByRef size As UInteger   ' DWORD* out
) As Integer
End Function

' numDecoders : DWORD* out
' size : DWORD* out
Declare PtrSafe Function GdipGetImageDecodersSize Lib "gdiplus" ( _
    ByRef numDecoders As Long, _
    ByRef size 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

GdipGetImageDecodersSize = ctypes.windll.gdiplus.GdipGetImageDecodersSize
GdipGetImageDecodersSize.restype = ctypes.c_int
GdipGetImageDecodersSize.argtypes = [
    ctypes.POINTER(wintypes.DWORD),  # numDecoders : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # size : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('gdiplus.dll')
GdipGetImageDecodersSize = Fiddle::Function.new(
  lib['GdipGetImageDecodersSize'],
  [
    Fiddle::TYPE_VOIDP,  # numDecoders : DWORD* out
    Fiddle::TYPE_VOIDP,  # size : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "gdiplus")]
extern "system" {
    fn GdipGetImageDecodersSize(
        numDecoders: *mut u32,  // DWORD* out
        size: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("gdiplus.dll")]
public static extern int GdipGetImageDecodersSize(out uint numDecoders, out uint size);
"@
$api = Add-Type -MemberDefinition $sig -Name 'gdiplus_GdipGetImageDecodersSize' -Namespace Win32 -PassThru
# $api::GdipGetImageDecodersSize(numDecoders, size)

#uselib "gdiplus.dll"
#func global GdipGetImageDecodersSize "GdipGetImageDecodersSize" sptr, sptr
; GdipGetImageDecodersSize varptr(numDecoders), varptr(size)   ; 戻り値は stat
; numDecoders : DWORD* out -> "sptr"
; size : DWORD* 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。

#uselib "gdiplus.dll"
#cfunc global GdipGetImageDecodersSize "GdipGetImageDecodersSize" var, var
; res = GdipGetImageDecodersSize(numDecoders, size)
; numDecoders : DWORD* out -> "var"
; size : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; Status GdipGetImageDecodersSize(DWORD* numDecoders, DWORD* size)
#uselib "gdiplus.dll"
#cfunc global GdipGetImageDecodersSize "GdipGetImageDecodersSize" var, var
; res = GdipGetImageDecodersSize(numDecoders, size)
; numDecoders : DWORD* out -> "var"
; size : DWORD* out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	gdiplus = windows.NewLazySystemDLL("gdiplus.dll")
	procGdipGetImageDecodersSize = gdiplus.NewProc("GdipGetImageDecodersSize")
)

// numDecoders (DWORD* out), size (DWORD* out)
r1, _, err := procGdipGetImageDecodersSize.Call(
	uintptr(numDecoders),
	uintptr(size),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // Status

function GdipGetImageDecodersSize(
  numDecoders: Pointer;   // DWORD* out
  size: Pointer   // DWORD* out
): Integer; stdcall;
  external 'gdiplus.dll' name 'GdipGetImageDecodersSize';

result := DllCall("gdiplus\GdipGetImageDecodersSize"
    , "Ptr", numDecoders   ; DWORD* out
    , "Ptr", size   ; DWORD* out
    , "Int")   ; return: Status

●GdipGetImageDecodersSize(numDecoders, size) = DLL("gdiplus.dll", "int GdipGetImageDecodersSize(void*, void*)")
# 呼び出し: GdipGetImageDecodersSize(numDecoders, size)
# numDecoders : DWORD* out -> "void*"
# size : DWORD* 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)。