AccessibleChildren

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

HRESULT AccessibleChildren(
    IAccessible* paccContainer,
    INT iChildStart,
    INT cChildren,
    VARIANT* rgvarChildren,
    INT* pcObtained
);

<DllImport("OLEACC.dll", ExactSpelling:=True)>
Public Shared Function AccessibleChildren(
    paccContainer As IntPtr,   ' IAccessible*
    iChildStart As Integer,   ' INT
    cChildren As Integer,   ' INT
    rgvarChildren As IntPtr,   ' VARIANT* out
    <Out> ByRef pcObtained As Integer   ' INT* out
) As Integer
End Function

' paccContainer : IAccessible*
' iChildStart : INT
' cChildren : INT
' rgvarChildren : VARIANT* out
' pcObtained : INT* out
Declare PtrSafe Function AccessibleChildren Lib "oleacc" ( _
    ByVal paccContainer As LongPtr, _
    ByVal iChildStart As Long, _
    ByVal cChildren As Long, _
    ByVal rgvarChildren As LongPtr, _
    ByRef pcObtained 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

AccessibleChildren = ctypes.windll.oleacc.AccessibleChildren
AccessibleChildren.restype = ctypes.c_int
AccessibleChildren.argtypes = [
    ctypes.c_void_p,  # paccContainer : IAccessible*
    ctypes.c_int,  # iChildStart : INT
    ctypes.c_int,  # cChildren : INT
    ctypes.c_void_p,  # rgvarChildren : VARIANT* out
    ctypes.POINTER(ctypes.c_int),  # pcObtained : INT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEACC.dll')
AccessibleChildren = Fiddle::Function.new(
  lib['AccessibleChildren'],
  [
    Fiddle::TYPE_VOIDP,  # paccContainer : IAccessible*
    Fiddle::TYPE_INT,  # iChildStart : INT
    Fiddle::TYPE_INT,  # cChildren : INT
    Fiddle::TYPE_VOIDP,  # rgvarChildren : VARIANT* out
    Fiddle::TYPE_VOIDP,  # pcObtained : INT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleacc")]
extern "system" {
    fn AccessibleChildren(
        paccContainer: *mut core::ffi::c_void,  // IAccessible*
        iChildStart: i32,  // INT
        cChildren: i32,  // INT
        rgvarChildren: *mut VARIANT,  // VARIANT* out
        pcObtained: *mut i32  // INT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEACC.dll")]
public static extern int AccessibleChildren(IntPtr paccContainer, int iChildStart, int cChildren, IntPtr rgvarChildren, out int pcObtained);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEACC_AccessibleChildren' -Namespace Win32 -PassThru
# $api::AccessibleChildren(paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained)

#uselib "OLEACC.dll"
#func global AccessibleChildren "AccessibleChildren" sptr, sptr, sptr, sptr, sptr
; AccessibleChildren paccContainer, iChildStart, cChildren, varptr(rgvarChildren), varptr(pcObtained)   ; 戻り値は stat
; paccContainer : IAccessible* -> "sptr"
; iChildStart : INT -> "sptr"
; cChildren : INT -> "sptr"
; rgvarChildren : VARIANT* out -> "sptr"
; pcObtained : INT* 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 (
	oleacc = windows.NewLazySystemDLL("OLEACC.dll")
	procAccessibleChildren = oleacc.NewProc("AccessibleChildren")
)

// paccContainer (IAccessible*), iChildStart (INT), cChildren (INT), rgvarChildren (VARIANT* out), pcObtained (INT* out)
r1, _, err := procAccessibleChildren.Call(
	uintptr(paccContainer),
	uintptr(iChildStart),
	uintptr(cChildren),
	uintptr(rgvarChildren),
	uintptr(pcObtained),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AccessibleChildren(
  paccContainer: Pointer;   // IAccessible*
  iChildStart: Integer;   // INT
  cChildren: Integer;   // INT
  rgvarChildren: Pointer;   // VARIANT* out
  pcObtained: Pointer   // INT* out
): Integer; stdcall;
  external 'OLEACC.dll' name 'AccessibleChildren';

result := DllCall("OLEACC\AccessibleChildren"
    , "Ptr", paccContainer   ; IAccessible*
    , "Int", iChildStart   ; INT
    , "Int", cChildren   ; INT
    , "Ptr", rgvarChildren   ; VARIANT* out
    , "Ptr", pcObtained   ; INT* out
    , "Int")   ; return: HRESULT

●AccessibleChildren(paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained) = DLL("OLEACC.dll", "int AccessibleChildren(void*, int, int, void*, void*)")
# 呼び出し: AccessibleChildren(paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained)
# paccContainer : IAccessible* -> "void*"
# iChildStart : INT -> "int"
# cChildren : INT -> "int"
# rgvarChildren : VARIANT* out -> "void*"
# pcObtained : INT* 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 "oleacc" fn AccessibleChildren(
    paccContainer: ?*anyopaque, // IAccessible*
    iChildStart: i32, // INT
    cChildren: i32, // INT
    rgvarChildren: [*c]VARIANT, // VARIANT* out
    pcObtained: [*c]i32 // INT* out
) callconv(std.os.windows.WINAPI) i32;

proc AccessibleChildren(
    paccContainer: pointer,  # IAccessible*
    iChildStart: int32,  # INT
    cChildren: int32,  # INT
    rgvarChildren: ptr VARIANT,  # VARIANT* out
    pcObtained: ptr int32  # INT* out
): int32 {.importc: "AccessibleChildren", stdcall, dynlib: "OLEACC.dll".}

pragma(lib, "oleacc");
extern(Windows)
int AccessibleChildren(
    void* paccContainer,   // IAccessible*
    int iChildStart,   // INT
    int cChildren,   // INT
    VARIANT* rgvarChildren,   // VARIANT* out
    int* pcObtained   // INT* out
);

ccall((:AccessibleChildren, "OLEACC.dll"), stdcall, Int32,
      (Ptr{Cvoid}, Int32, Int32, Ptr{VARIANT}, Ptr{Int32}),
      paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained)
# paccContainer : IAccessible* -> Ptr{Cvoid}
# iChildStart : INT -> Int32
# cChildren : INT -> Int32
# rgvarChildren : VARIANT* out -> Ptr{VARIANT}
# pcObtained : INT* 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 AccessibleChildren(
    void* paccContainer,
    int32_t iChildStart,
    int32_t cChildren,
    void* rgvarChildren,
    int32_t* pcObtained);
]]
local oleacc = ffi.load("oleacc")
-- oleacc.AccessibleChildren(paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained)
-- paccContainer : IAccessible*
-- iChildStart : INT
-- cChildren : INT
-- rgvarChildren : VARIANT* out
-- pcObtained : INT* 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('OLEACC.dll');
const AccessibleChildren = lib.func('__stdcall', 'AccessibleChildren', 'int32_t', ['void *', 'int32_t', 'int32_t', 'void *', 'int32_t *']);
// AccessibleChildren(paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained)
// paccContainer : IAccessible* -> 'void *'
// iChildStart : INT -> 'int32_t'
// cChildren : INT -> 'int32_t'
// rgvarChildren : VARIANT* out -> 'void *'
// pcObtained : INT* 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("OLEACC.dll", {
  AccessibleChildren: { parameters: ["pointer", "i32", "i32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.AccessibleChildren(paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained)
// paccContainer : IAccessible* -> "pointer"
// iChildStart : INT -> "i32"
// cChildren : INT -> "i32"
// rgvarChildren : VARIANT* out -> "pointer"
// pcObtained : INT* 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 AccessibleChildren(
    void* paccContainer,
    int32_t iChildStart,
    int32_t cChildren,
    void* rgvarChildren,
    int32_t* pcObtained);
C, "OLEACC.dll");
// $ffi->AccessibleChildren(paccContainer, iChildStart, cChildren, rgvarChildren, pcObtained);
// paccContainer : IAccessible*
// iChildStart : INT
// cChildren : INT
// rgvarChildren : VARIANT* out
// pcObtained : INT* 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 Oleacc extends StdCallLibrary {
    Oleacc INSTANCE = Native.load("oleacc", Oleacc.class);
    int AccessibleChildren(
        Pointer paccContainer,   // IAccessible*
        int iChildStart,   // INT
        int cChildren,   // INT
        Pointer rgvarChildren,   // VARIANT* out
        IntByReference pcObtained   // INT* out
    );
}

@[Link("oleacc")]
lib LibOLEACC
  fun AccessibleChildren = AccessibleChildren(
    paccContainer : Void*,   # IAccessible*
    iChildStart : Int32,   # INT
    cChildren : Int32,   # INT
    rgvarChildren : VARIANT*,   # VARIANT* out
    pcObtained : Int32*   # INT* 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 AccessibleChildrenNative = Int32 Function(Pointer<Void>, Int32, Int32, Pointer<Void>, Pointer<Int32>);
typedef AccessibleChildrenDart = int Function(Pointer<Void>, int, int, Pointer<Void>, Pointer<Int32>);
final AccessibleChildren = DynamicLibrary.open('OLEACC.dll')
    .lookupFunction<AccessibleChildrenNative, AccessibleChildrenDart>('AccessibleChildren');
// paccContainer : IAccessible* -> Pointer<Void>
// iChildStart : INT -> Int32
// cChildren : INT -> Int32
// rgvarChildren : VARIANT* out -> Pointer<Void>
// pcObtained : INT* out -> Pointer<Int32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function AccessibleChildren(
  paccContainer: Pointer;   // IAccessible*
  iChildStart: Integer;   // INT
  cChildren: Integer;   // INT
  rgvarChildren: Pointer;   // VARIANT* out
  pcObtained: Pointer   // INT* out
): Integer; stdcall;
  external 'OLEACC.dll' name 'AccessibleChildren';

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

foreign import stdcall safe "AccessibleChildren"
  c_AccessibleChildren :: Ptr () -> Int32 -> Int32 -> Ptr () -> Ptr Int32 -> IO Int32
-- paccContainer : IAccessible* -> Ptr ()
-- iChildStart : INT -> Int32
-- cChildren : INT -> Int32
-- rgvarChildren : VARIANT* out -> Ptr ()
-- pcObtained : INT* 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 accessiblechildren =
  foreign "AccessibleChildren"
    ((ptr void) @-> int32_t @-> int32_t @-> (ptr void) @-> (ptr int32_t) @-> returning int32_t)
(* paccContainer : IAccessible* -> (ptr void) *)
(* iChildStart : INT -> int32_t *)
(* cChildren : INT -> int32_t *)
(* rgvarChildren : VARIANT* out -> (ptr void) *)
(* pcObtained : INT* 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 oleacc (t "OLEACC.dll"))
(cffi:use-foreign-library oleacc)

(cffi:defcfun ("AccessibleChildren" accessible-children :convention :stdcall) :int32
  (pacc-container :pointer)   ; IAccessible*
  (i-child-start :int32)   ; INT
  (c-children :int32)   ; INT
  (rgvar-children :pointer)   ; VARIANT* out
  (pc-obtained :pointer))   ; INT* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $AccessibleChildren = Win32::API::More->new('OLEACC',
    'int AccessibleChildren(LPVOID paccContainer, int iChildStart, int cChildren, LPVOID rgvarChildren, LPVOID pcObtained)');
# my $ret = $AccessibleChildren->Call($paccContainer, $iChildStart, $cChildren, $rgvarChildren, $pcObtained);
# paccContainer : IAccessible* -> LPVOID
# iChildStart : INT -> int
# cChildren : INT -> int
# rgvarChildren : VARIANT* out -> LPVOID
# pcObtained : INT* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。