AccessibleObjectFromEvent

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

HRESULT AccessibleObjectFromEvent(
    HWND hwnd,
    DWORD dwId,
    DWORD dwChildId,
    IAccessible** ppacc,
    VARIANT* pvarChild
);

<DllImport("OLEACC.dll", ExactSpelling:=True)>
Public Shared Function AccessibleObjectFromEvent(
    hwnd As IntPtr,   ' HWND
    dwId As UInteger,   ' DWORD
    dwChildId As UInteger,   ' DWORD
    ppacc As IntPtr,   ' IAccessible** out
    pvarChild As IntPtr   ' VARIANT* out
) As Integer
End Function

' hwnd : HWND
' dwId : DWORD
' dwChildId : DWORD
' ppacc : IAccessible** out
' pvarChild : VARIANT* out
Declare PtrSafe Function AccessibleObjectFromEvent Lib "oleacc" ( _
    ByVal hwnd As LongPtr, _
    ByVal dwId As Long, _
    ByVal dwChildId As Long, _
    ByVal ppacc As LongPtr, _
    ByVal pvarChild 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

AccessibleObjectFromEvent = ctypes.windll.oleacc.AccessibleObjectFromEvent
AccessibleObjectFromEvent.restype = ctypes.c_int
AccessibleObjectFromEvent.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND
    wintypes.DWORD,  # dwId : DWORD
    wintypes.DWORD,  # dwChildId : DWORD
    ctypes.c_void_p,  # ppacc : IAccessible** out
    ctypes.c_void_p,  # pvarChild : VARIANT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEACC.dll')
AccessibleObjectFromEvent = Fiddle::Function.new(
  lib['AccessibleObjectFromEvent'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND
    -Fiddle::TYPE_INT,  # dwId : DWORD
    -Fiddle::TYPE_INT,  # dwChildId : DWORD
    Fiddle::TYPE_VOIDP,  # ppacc : IAccessible** out
    Fiddle::TYPE_VOIDP,  # pvarChild : VARIANT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleacc")]
extern "system" {
    fn AccessibleObjectFromEvent(
        hwnd: *mut core::ffi::c_void,  // HWND
        dwId: u32,  // DWORD
        dwChildId: u32,  // DWORD
        ppacc: *mut *mut core::ffi::c_void,  // IAccessible** out
        pvarChild: *mut VARIANT  // VARIANT* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEACC.dll")]
public static extern int AccessibleObjectFromEvent(IntPtr hwnd, uint dwId, uint dwChildId, IntPtr ppacc, IntPtr pvarChild);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEACC_AccessibleObjectFromEvent' -Namespace Win32 -PassThru
# $api::AccessibleObjectFromEvent(hwnd, dwId, dwChildId, ppacc, pvarChild)

#uselib "OLEACC.dll"
#func global AccessibleObjectFromEvent "AccessibleObjectFromEvent" sptr, sptr, sptr, sptr, sptr
; AccessibleObjectFromEvent hwnd, dwId, dwChildId, ppacc, varptr(pvarChild)   ; 戻り値は stat
; hwnd : HWND -> "sptr"
; dwId : DWORD -> "sptr"
; dwChildId : DWORD -> "sptr"
; ppacc : IAccessible** out -> "sptr"
; pvarChild : VARIANT* 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 AccessibleObjectFromEvent "AccessibleObjectFromEvent" sptr, int, int, sptr, var
; res = AccessibleObjectFromEvent(hwnd, dwId, dwChildId, ppacc, pvarChild)
; hwnd : HWND -> "sptr"
; dwId : DWORD -> "int"
; dwChildId : DWORD -> "int"
; ppacc : IAccessible** out -> "sptr"
; pvarChild : VARIANT* 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。

; HRESULT AccessibleObjectFromEvent(HWND hwnd, DWORD dwId, DWORD dwChildId, IAccessible** ppacc, VARIANT* pvarChild)
#uselib "OLEACC.dll"
#cfunc global AccessibleObjectFromEvent "AccessibleObjectFromEvent" intptr, int, int, intptr, var
; res = AccessibleObjectFromEvent(hwnd, dwId, dwChildId, ppacc, pvarChild)
; hwnd : HWND -> "intptr"
; dwId : DWORD -> "int"
; dwChildId : DWORD -> "int"
; ppacc : IAccessible** out -> "intptr"
; pvarChild : VARIANT* 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 (
	oleacc = windows.NewLazySystemDLL("OLEACC.dll")
	procAccessibleObjectFromEvent = oleacc.NewProc("AccessibleObjectFromEvent")
)

// hwnd (HWND), dwId (DWORD), dwChildId (DWORD), ppacc (IAccessible** out), pvarChild (VARIANT* out)
r1, _, err := procAccessibleObjectFromEvent.Call(
	uintptr(hwnd),
	uintptr(dwId),
	uintptr(dwChildId),
	uintptr(ppacc),
	uintptr(pvarChild),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AccessibleObjectFromEvent(
  hwnd: THandle;   // HWND
  dwId: DWORD;   // DWORD
  dwChildId: DWORD;   // DWORD
  ppacc: Pointer;   // IAccessible** out
  pvarChild: Pointer   // VARIANT* out
): Integer; stdcall;
  external 'OLEACC.dll' name 'AccessibleObjectFromEvent';

result := DllCall("OLEACC\AccessibleObjectFromEvent"
    , "Ptr", hwnd   ; HWND
    , "UInt", dwId   ; DWORD
    , "UInt", dwChildId   ; DWORD
    , "Ptr", ppacc   ; IAccessible** out
    , "Ptr", pvarChild   ; VARIANT* out
    , "Int")   ; return: HRESULT

●AccessibleObjectFromEvent(hwnd, dwId, dwChildId, ppacc, pvarChild) = DLL("OLEACC.dll", "int AccessibleObjectFromEvent(void*, dword, dword, void*, void*)")
# 呼び出し: AccessibleObjectFromEvent(hwnd, dwId, dwChildId, ppacc, pvarChild)
# hwnd : HWND -> "void*"
# dwId : DWORD -> "dword"
# dwChildId : DWORD -> "dword"
# ppacc : IAccessible** out -> "void*"
# pvarChild : VARIANT* 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)。