AccessibleObjectFromWindow

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

HRESULT AccessibleObjectFromWindow(
    HWND hwnd,
    DWORD dwId,
    const GUID* riid,
    void** ppvObject
);

<DllImport("OLEACC.dll", ExactSpelling:=True)>
Public Shared Function AccessibleObjectFromWindow(
    hwnd As IntPtr,   ' HWND
    dwId As UInteger,   ' DWORD
    ByRef riid As Guid,   ' GUID*
    ppvObject As IntPtr   ' void** out
) As Integer
End Function

' hwnd : HWND
' dwId : DWORD
' riid : GUID*
' ppvObject : void** out
Declare PtrSafe Function AccessibleObjectFromWindow Lib "oleacc" ( _
    ByVal hwnd As LongPtr, _
    ByVal dwId As Long, _
    ByVal riid As LongPtr, _
    ByVal ppvObject 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

AccessibleObjectFromWindow = ctypes.windll.oleacc.AccessibleObjectFromWindow
AccessibleObjectFromWindow.restype = ctypes.c_int
AccessibleObjectFromWindow.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    wintypes.DWORD,  # dwId : DWORD
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppvObject : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEACC.dll')
AccessibleObjectFromWindow = Fiddle::Function.new(
  lib['AccessibleObjectFromWindow'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    -Fiddle::TYPE_INT,  # dwId : DWORD
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppvObject : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleacc")]
extern "system" {
    fn AccessibleObjectFromWindow(
        hwnd: *mut core::ffi::c_void,  // HWND
        dwId: u32,  // DWORD
        riid: *const GUID,  // GUID*
        ppvObject: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEACC.dll")]
public static extern int AccessibleObjectFromWindow(IntPtr hwnd, uint dwId, ref Guid riid, IntPtr ppvObject);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEACC_AccessibleObjectFromWindow' -Namespace Win32 -PassThru
# $api::AccessibleObjectFromWindow(hwnd, dwId, riid, ppvObject)

#uselib "OLEACC.dll"
#func global AccessibleObjectFromWindow "AccessibleObjectFromWindow" sptr, sptr, sptr, sptr
; AccessibleObjectFromWindow hwnd, dwId, varptr(riid), ppvObject   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; dwId : DWORD -> "sptr"
; riid : GUID* -> "sptr"
; ppvObject : void** 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 "OLEACC.dll"
#cfunc global AccessibleObjectFromWindow "AccessibleObjectFromWindow" sptr, int, var, sptr
; res = AccessibleObjectFromWindow(hwnd, dwId, riid, ppvObject)
; hwnd : HWND -> "sptr"
; dwId : DWORD -> "int"
; riid : GUID* -> "var"
; ppvObject : void** out -> "sptr"
; ※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。

; HRESULT AccessibleObjectFromWindow(HWND hwnd, DWORD dwId, GUID* riid, void** ppvObject)
#uselib "OLEACC.dll"
#cfunc global AccessibleObjectFromWindow "AccessibleObjectFromWindow" intptr, int, var, intptr
; res = AccessibleObjectFromWindow(hwnd, dwId, riid, ppvObject)
; hwnd : HWND -> "intptr"
; dwId : DWORD -> "int"
; riid : GUID* -> "var"
; ppvObject : void** out -> "intptr"
; ※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 (
	oleacc = windows.NewLazySystemDLL("OLEACC.dll")
	procAccessibleObjectFromWindow = oleacc.NewProc("AccessibleObjectFromWindow")
)

// hwnd (HWND), dwId (DWORD), riid (GUID*), ppvObject (void** out)
r1, _, err := procAccessibleObjectFromWindow.Call(
	uintptr(hwnd),
	uintptr(dwId),
	uintptr(riid),
	uintptr(ppvObject),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AccessibleObjectFromWindow(
  hwnd: THandle;   // HWND
  dwId: DWORD;   // DWORD
  riid: PGUID;   // GUID*
  ppvObject: Pointer   // void** out
): Integer; stdcall;
  external 'OLEACC.dll' name 'AccessibleObjectFromWindow';

result := DllCall("OLEACC\AccessibleObjectFromWindow"
    , "Ptr", hwnd   ; HWND
    , "UInt", dwId   ; DWORD
    , "Ptr", riid   ; GUID*
    , "Ptr", ppvObject   ; void** out
    , "Int")   ; return: HRESULT

●AccessibleObjectFromWindow(hwnd, dwId, riid, ppvObject) = DLL("OLEACC.dll", "int AccessibleObjectFromWindow(void*, dword, void*, void*)")
# 呼び出し: AccessibleObjectFromWindow(hwnd, dwId, riid, ppvObject)
# hwnd : HWND -> "void*"
# dwId : DWORD -> "dword"
# riid : GUID* -> "void*"
# ppvObject : void** 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)。