FindFirstFreeAce

// ADVAPI32.dll
#include <windows.h>

BOOL FindFirstFreeAce(
    ACL* pAcl,
    void** pAce
);

<DllImport("ADVAPI32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function FindFirstFreeAce(
    pAcl As IntPtr,   ' ACL*
    pAce As IntPtr   ' void** out
) As Boolean
End Function

' pAcl : ACL*
' pAce : void** out
Declare PtrSafe Function FindFirstFreeAce Lib "advapi32" ( _
    ByVal pAcl As LongPtr, _
    ByVal pAce 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

FindFirstFreeAce = ctypes.windll.advapi32.FindFirstFreeAce
FindFirstFreeAce.restype = wintypes.BOOL
FindFirstFreeAce.argtypes = [
    ctypes.c_void_p,  # pAcl : ACL*
    ctypes.c_void_p,  # pAce : void** out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
FindFirstFreeAce = Fiddle::Function.new(
  lib['FindFirstFreeAce'],
  [
    Fiddle::TYPE_VOIDP,  # pAcl : ACL*
    Fiddle::TYPE_VOIDP,  # pAce : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn FindFirstFreeAce(
        pAcl: *mut ACL,  // ACL*
        pAce: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", SetLastError = true)]
public static extern bool FindFirstFreeAce(IntPtr pAcl, IntPtr pAce);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_FindFirstFreeAce' -Namespace Win32 -PassThru
# $api::FindFirstFreeAce(pAcl, pAce)

#uselib "ADVAPI32.dll"
#func global FindFirstFreeAce "FindFirstFreeAce" sptr, sptr
; FindFirstFreeAce varptr(pAcl), pAce   ; 戻り値は stat
; pAcl : ACL* -> "sptr"
; pAce : 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 "ADVAPI32.dll"
#cfunc global FindFirstFreeAce "FindFirstFreeAce" var, sptr
; res = FindFirstFreeAce(pAcl, pAce)
; pAcl : ACL* -> "var"
; pAce : 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。

; BOOL FindFirstFreeAce(ACL* pAcl, void** pAce)
#uselib "ADVAPI32.dll"
#cfunc global FindFirstFreeAce "FindFirstFreeAce" var, intptr
; res = FindFirstFreeAce(pAcl, pAce)
; pAcl : ACL* -> "var"
; pAce : 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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procFindFirstFreeAce = advapi32.NewProc("FindFirstFreeAce")
)

// pAcl (ACL*), pAce (void** out)
r1, _, err := procFindFirstFreeAce.Call(
	uintptr(pAcl),
	uintptr(pAce),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function FindFirstFreeAce(
  pAcl: Pointer;   // ACL*
  pAce: Pointer   // void** out
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'FindFirstFreeAce';

result := DllCall("ADVAPI32\FindFirstFreeAce"
    , "Ptr", pAcl   ; ACL*
    , "Ptr", pAce   ; void** out
    , "Int")   ; return: BOOL

●FindFirstFreeAce(pAcl, pAce) = DLL("ADVAPI32.dll", "bool FindFirstFreeAce(void*, void*)")
# 呼び出し: FindFirstFreeAce(pAcl, pAce)
# pAcl : ACL* -> "void*"
# pAce : 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)。