UiaNodeFromFocus

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

HRESULT UiaNodeFromFocus(
    UiaCacheRequest* pRequest,
    SAFEARRAY** ppRequestedData,
    LPWSTR* ppTreeStructure
);

<DllImport("UIAutomationCore.dll", ExactSpelling:=True)>
Public Shared Function UiaNodeFromFocus(
    pRequest As IntPtr,   ' UiaCacheRequest* in/out
    ppRequestedData As IntPtr,   ' SAFEARRAY** in/out
    ppTreeStructure As IntPtr   ' LPWSTR* in/out
) As Integer
End Function

' pRequest : UiaCacheRequest* in/out
' ppRequestedData : SAFEARRAY** in/out
' ppTreeStructure : LPWSTR* in/out
Declare PtrSafe Function UiaNodeFromFocus Lib "uiautomationcore" ( _
    ByVal pRequest As LongPtr, _
    ByVal ppRequestedData As LongPtr, _
    ByVal ppTreeStructure 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

UiaNodeFromFocus = ctypes.windll.uiautomationcore.UiaNodeFromFocus
UiaNodeFromFocus.restype = ctypes.c_int
UiaNodeFromFocus.argtypes = [
    ctypes.c_void_p,  # pRequest : UiaCacheRequest* in/out
    ctypes.c_void_p,  # ppRequestedData : SAFEARRAY** in/out
    ctypes.c_void_p,  # ppTreeStructure : LPWSTR* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('UIAutomationCore.dll')
UiaNodeFromFocus = Fiddle::Function.new(
  lib['UiaNodeFromFocus'],
  [
    Fiddle::TYPE_VOIDP,  # pRequest : UiaCacheRequest* in/out
    Fiddle::TYPE_VOIDP,  # ppRequestedData : SAFEARRAY** in/out
    Fiddle::TYPE_VOIDP,  # ppTreeStructure : LPWSTR* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "uiautomationcore")]
extern "system" {
    fn UiaNodeFromFocus(
        pRequest: *mut UiaCacheRequest,  // UiaCacheRequest* in/out
        ppRequestedData: *mut *mut SAFEARRAY,  // SAFEARRAY** in/out
        ppTreeStructure: *mut *mut u16  // LPWSTR* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("UIAutomationCore.dll")]
public static extern int UiaNodeFromFocus(IntPtr pRequest, IntPtr ppRequestedData, IntPtr ppTreeStructure);
"@
$api = Add-Type -MemberDefinition $sig -Name 'UIAutomationCore_UiaNodeFromFocus' -Namespace Win32 -PassThru
# $api::UiaNodeFromFocus(pRequest, ppRequestedData, ppTreeStructure)

#uselib "UIAutomationCore.dll"
#func global UiaNodeFromFocus "UiaNodeFromFocus" sptr, sptr, sptr
; UiaNodeFromFocus varptr(pRequest), varptr(ppRequestedData), varptr(ppTreeStructure)   ; 戻り値は stat
; pRequest : UiaCacheRequest* in/out -> "sptr"
; ppRequestedData : SAFEARRAY** in/out -> "sptr"
; ppTreeStructure : LPWSTR* in/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 "UIAutomationCore.dll"
#cfunc global UiaNodeFromFocus "UiaNodeFromFocus" var, var, var
; res = UiaNodeFromFocus(pRequest, ppRequestedData, ppTreeStructure)
; pRequest : UiaCacheRequest* in/out -> "var"
; ppRequestedData : SAFEARRAY** in/out -> "var"
; ppTreeStructure : LPWSTR* in/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 UiaNodeFromFocus(UiaCacheRequest* pRequest, SAFEARRAY** ppRequestedData, LPWSTR* ppTreeStructure)
#uselib "UIAutomationCore.dll"
#cfunc global UiaNodeFromFocus "UiaNodeFromFocus" var, var, var
; res = UiaNodeFromFocus(pRequest, ppRequestedData, ppTreeStructure)
; pRequest : UiaCacheRequest* in/out -> "var"
; ppRequestedData : SAFEARRAY** in/out -> "var"
; ppTreeStructure : LPWSTR* in/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 (
	uiautomationcore = windows.NewLazySystemDLL("UIAutomationCore.dll")
	procUiaNodeFromFocus = uiautomationcore.NewProc("UiaNodeFromFocus")
)

// pRequest (UiaCacheRequest* in/out), ppRequestedData (SAFEARRAY** in/out), ppTreeStructure (LPWSTR* in/out)
r1, _, err := procUiaNodeFromFocus.Call(
	uintptr(pRequest),
	uintptr(ppRequestedData),
	uintptr(ppTreeStructure),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function UiaNodeFromFocus(
  pRequest: Pointer;   // UiaCacheRequest* in/out
  ppRequestedData: Pointer;   // SAFEARRAY** in/out
  ppTreeStructure: PPWideChar   // LPWSTR* in/out
): Integer; stdcall;
  external 'UIAutomationCore.dll' name 'UiaNodeFromFocus';

result := DllCall("UIAutomationCore\UiaNodeFromFocus"
    , "Ptr", pRequest   ; UiaCacheRequest* in/out
    , "Ptr", ppRequestedData   ; SAFEARRAY** in/out
    , "Ptr", ppTreeStructure   ; LPWSTR* in/out
    , "Int")   ; return: HRESULT

●UiaNodeFromFocus(pRequest, ppRequestedData, ppTreeStructure) = DLL("UIAutomationCore.dll", "int UiaNodeFromFocus(void*, void*, void*)")
# 呼び出し: UiaNodeFromFocus(pRequest, ppRequestedData, ppTreeStructure)
# pRequest : UiaCacheRequest* in/out -> "void*"
# ppRequestedData : SAFEARRAY** in/out -> "void*"
# ppTreeStructure : LPWSTR* in/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)。