RegGetKeySecurity

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

WIN32_ERROR RegGetKeySecurity(
    HKEY hKey,
    OBJECT_SECURITY_INFORMATION SecurityInformation,
    PSECURITY_DESCRIPTOR pSecurityDescriptor,   // optional
    DWORD* lpcbSecurityDescriptor
);

<DllImport("ADVAPI32.dll", ExactSpelling:=True)>
Public Shared Function RegGetKeySecurity(
    hKey As IntPtr,   ' HKEY
    SecurityInformation As UInteger,   ' OBJECT_SECURITY_INFORMATION
    pSecurityDescriptor As IntPtr,   ' PSECURITY_DESCRIPTOR optional, out
    ByRef lpcbSecurityDescriptor As UInteger   ' DWORD* in/out
) As UInteger
End Function

' hKey : HKEY
' SecurityInformation : OBJECT_SECURITY_INFORMATION
' pSecurityDescriptor : PSECURITY_DESCRIPTOR optional, out
' lpcbSecurityDescriptor : DWORD* in/out
Declare PtrSafe Function RegGetKeySecurity Lib "advapi32" ( _
    ByVal hKey As LongPtr, _
    ByVal SecurityInformation As Long, _
    ByVal pSecurityDescriptor As LongPtr, _
    ByRef lpcbSecurityDescriptor As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

RegGetKeySecurity = ctypes.windll.advapi32.RegGetKeySecurity
RegGetKeySecurity.restype = wintypes.DWORD
RegGetKeySecurity.argtypes = [
    wintypes.HANDLE,  # hKey : HKEY
    wintypes.DWORD,  # SecurityInformation : OBJECT_SECURITY_INFORMATION
    wintypes.HANDLE,  # pSecurityDescriptor : PSECURITY_DESCRIPTOR optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpcbSecurityDescriptor : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
RegGetKeySecurity = Fiddle::Function.new(
  lib['RegGetKeySecurity'],
  [
    Fiddle::TYPE_VOIDP,  # hKey : HKEY
    -Fiddle::TYPE_INT,  # SecurityInformation : OBJECT_SECURITY_INFORMATION
    Fiddle::TYPE_VOIDP,  # pSecurityDescriptor : PSECURITY_DESCRIPTOR optional, out
    Fiddle::TYPE_VOIDP,  # lpcbSecurityDescriptor : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn RegGetKeySecurity(
        hKey: *mut core::ffi::c_void,  // HKEY
        SecurityInformation: u32,  // OBJECT_SECURITY_INFORMATION
        pSecurityDescriptor: *mut core::ffi::c_void,  // PSECURITY_DESCRIPTOR optional, out
        lpcbSecurityDescriptor: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll")]
public static extern uint RegGetKeySecurity(IntPtr hKey, uint SecurityInformation, IntPtr pSecurityDescriptor, ref uint lpcbSecurityDescriptor);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_RegGetKeySecurity' -Namespace Win32 -PassThru
# $api::RegGetKeySecurity(hKey, SecurityInformation, pSecurityDescriptor, lpcbSecurityDescriptor)

#uselib "ADVAPI32.dll"
#func global RegGetKeySecurity "RegGetKeySecurity" sptr, sptr, sptr, sptr
; RegGetKeySecurity hKey, SecurityInformation, pSecurityDescriptor, varptr(lpcbSecurityDescriptor)   ; 戻り値は stat
; hKey : HKEY -> "sptr"
; SecurityInformation : OBJECT_SECURITY_INFORMATION -> "sptr"
; pSecurityDescriptor : PSECURITY_DESCRIPTOR optional, out -> "sptr"
; lpcbSecurityDescriptor : DWORD* 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 "ADVAPI32.dll"
#cfunc global RegGetKeySecurity "RegGetKeySecurity" sptr, int, sptr, var
; res = RegGetKeySecurity(hKey, SecurityInformation, pSecurityDescriptor, lpcbSecurityDescriptor)
; hKey : HKEY -> "sptr"
; SecurityInformation : OBJECT_SECURITY_INFORMATION -> "int"
; pSecurityDescriptor : PSECURITY_DESCRIPTOR optional, out -> "sptr"
; lpcbSecurityDescriptor : DWORD* 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。

; WIN32_ERROR RegGetKeySecurity(HKEY hKey, OBJECT_SECURITY_INFORMATION SecurityInformation, PSECURITY_DESCRIPTOR pSecurityDescriptor, DWORD* lpcbSecurityDescriptor)
#uselib "ADVAPI32.dll"
#cfunc global RegGetKeySecurity "RegGetKeySecurity" intptr, int, intptr, var
; res = RegGetKeySecurity(hKey, SecurityInformation, pSecurityDescriptor, lpcbSecurityDescriptor)
; hKey : HKEY -> "intptr"
; SecurityInformation : OBJECT_SECURITY_INFORMATION -> "int"
; pSecurityDescriptor : PSECURITY_DESCRIPTOR optional, out -> "intptr"
; lpcbSecurityDescriptor : DWORD* 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 (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procRegGetKeySecurity = advapi32.NewProc("RegGetKeySecurity")
)

// hKey (HKEY), SecurityInformation (OBJECT_SECURITY_INFORMATION), pSecurityDescriptor (PSECURITY_DESCRIPTOR optional, out), lpcbSecurityDescriptor (DWORD* in/out)
r1, _, err := procRegGetKeySecurity.Call(
	uintptr(hKey),
	uintptr(SecurityInformation),
	uintptr(pSecurityDescriptor),
	uintptr(lpcbSecurityDescriptor),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function RegGetKeySecurity(
  hKey: THandle;   // HKEY
  SecurityInformation: DWORD;   // OBJECT_SECURITY_INFORMATION
  pSecurityDescriptor: THandle;   // PSECURITY_DESCRIPTOR optional, out
  lpcbSecurityDescriptor: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'ADVAPI32.dll' name 'RegGetKeySecurity';

result := DllCall("ADVAPI32\RegGetKeySecurity"
    , "Ptr", hKey   ; HKEY
    , "UInt", SecurityInformation   ; OBJECT_SECURITY_INFORMATION
    , "Ptr", pSecurityDescriptor   ; PSECURITY_DESCRIPTOR optional, out
    , "Ptr", lpcbSecurityDescriptor   ; DWORD* in/out
    , "UInt")   ; return: WIN32_ERROR

●RegGetKeySecurity(hKey, SecurityInformation, pSecurityDescriptor, lpcbSecurityDescriptor) = DLL("ADVAPI32.dll", "dword RegGetKeySecurity(void*, dword, void*, void*)")
# 呼び出し: RegGetKeySecurity(hKey, SecurityInformation, pSecurityDescriptor, lpcbSecurityDescriptor)
# hKey : HKEY -> "void*"
# SecurityInformation : OBJECT_SECURITY_INFORMATION -> "dword"
# pSecurityDescriptor : PSECURITY_DESCRIPTOR optional, out -> "void*"
# lpcbSecurityDescriptor : DWORD* 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)。