AccessibleObjectFromPoint

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

HRESULT AccessibleObjectFromPoint(
    POINT ptScreen,
    IAccessible** ppacc,
    VARIANT* pvarChild
);

<DllImport("OLEACC.dll", ExactSpelling:=True)>
Public Shared Function AccessibleObjectFromPoint(
    ptScreen As POINT,   ' POINT
    ppacc As IntPtr,   ' IAccessible** out
    pvarChild As IntPtr   ' VARIANT* out
) As Integer
End Function

' ptScreen : POINT
' ppacc : IAccessible** out
' pvarChild : VARIANT* out
Declare PtrSafe Function AccessibleObjectFromPoint Lib "oleacc" ( _
    ByVal ptScreen As LongPtr, _
    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

AccessibleObjectFromPoint = ctypes.windll.oleacc.AccessibleObjectFromPoint
AccessibleObjectFromPoint.restype = ctypes.c_int
AccessibleObjectFromPoint.argtypes = [
    POINT,  # ptScreen : POINT
    ctypes.c_void_p,  # ppacc : IAccessible** out
    ctypes.c_void_p,  # pvarChild : VARIANT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEACC.dll')
AccessibleObjectFromPoint = Fiddle::Function.new(
  lib['AccessibleObjectFromPoint'],
  [
    Fiddle::TYPE_VOIDP,  # ptScreen : POINT
    Fiddle::TYPE_VOIDP,  # ppacc : IAccessible** out
    Fiddle::TYPE_VOIDP,  # pvarChild : VARIANT* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleacc")]
extern "system" {
    fn AccessibleObjectFromPoint(
        ptScreen: POINT,  // POINT
        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 AccessibleObjectFromPoint(POINT ptScreen, IntPtr ppacc, IntPtr pvarChild);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEACC_AccessibleObjectFromPoint' -Namespace Win32 -PassThru
# $api::AccessibleObjectFromPoint(ptScreen, ppacc, pvarChild)

#uselib "OLEACC.dll"
#func global AccessibleObjectFromPoint "AccessibleObjectFromPoint" sptr, sptr, sptr
; AccessibleObjectFromPoint ptScreen, ppacc, varptr(pvarChild)   ; 戻り値は stat
; ptScreen : POINT -> "sptr"
; ppacc : IAccessible** out -> "sptr"
; pvarChild : VARIANT* out -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 AccessibleObjectFromPoint "AccessibleObjectFromPoint" int, sptr, var
; res = AccessibleObjectFromPoint(ptScreen, ppacc, pvarChild)
; ptScreen : POINT -> "int"
; ppacc : IAccessible** out -> "sptr"
; pvarChild : VARIANT* out -> "var"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 AccessibleObjectFromPoint(POINT ptScreen, IAccessible** ppacc, VARIANT* pvarChild)
#uselib "OLEACC.dll"
#cfunc global AccessibleObjectFromPoint "AccessibleObjectFromPoint" int, intptr, var
; res = AccessibleObjectFromPoint(ptScreen, ppacc, pvarChild)
; ptScreen : POINT -> "int"
; ppacc : IAccessible** out -> "intptr"
; pvarChild : VARIANT* out -> "var"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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")
	procAccessibleObjectFromPoint = oleacc.NewProc("AccessibleObjectFromPoint")
)

// ptScreen (POINT), ppacc (IAccessible** out), pvarChild (VARIANT* out)
r1, _, err := procAccessibleObjectFromPoint.Call(
	uintptr(ptScreen),
	uintptr(ppacc),
	uintptr(pvarChild),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function AccessibleObjectFromPoint(
  ptScreen: POINT;   // POINT
  ppacc: Pointer;   // IAccessible** out
  pvarChild: Pointer   // VARIANT* out
): Integer; stdcall;
  external 'OLEACC.dll' name 'AccessibleObjectFromPoint';

result := DllCall("OLEACC\AccessibleObjectFromPoint"
    , "Ptr", ptScreen   ; POINT
    , "Ptr", ppacc   ; IAccessible** out
    , "Ptr", pvarChild   ; VARIANT* out
    , "Int")   ; return: HRESULT

●AccessibleObjectFromPoint(ptScreen, ppacc, pvarChild) = DLL("OLEACC.dll", "int AccessibleObjectFromPoint(void*, void*, void*)")
# 呼び出し: AccessibleObjectFromPoint(ptScreen, ppacc, pvarChild)
# ptScreen : POINT -> "void*"
# 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)。