GetAppliedGPOListW

// USERENV.dll  (Unicode / -W)
#include <windows.h>

DWORD GetAppliedGPOListW(
    DWORD dwFlags,
    LPCWSTR pMachineName,   // optional
    PSID pSidUser,   // optional
    GUID* pGuidExtension,
    GROUP_POLICY_OBJECTW** ppGPOList
);

<DllImport("USERENV.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function GetAppliedGPOListW(
    dwFlags As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> pMachineName As String,   ' LPCWSTR optional
    pSidUser As IntPtr,   ' PSID optional
    ByRef pGuidExtension As Guid,   ' GUID*
    ppGPOList As IntPtr   ' GROUP_POLICY_OBJECTW** out
) As UInteger
End Function

' dwFlags : DWORD
' pMachineName : LPCWSTR optional
' pSidUser : PSID optional
' pGuidExtension : GUID*
' ppGPOList : GROUP_POLICY_OBJECTW** out
Declare PtrSafe Function GetAppliedGPOListW Lib "userenv" ( _
    ByVal dwFlags As Long, _
    ByVal pMachineName As LongPtr, _
    ByVal pSidUser As LongPtr, _
    ByVal pGuidExtension As LongPtr, _
    ByVal ppGPOList As LongPtr) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetAppliedGPOListW = ctypes.windll.userenv.GetAppliedGPOListW
GetAppliedGPOListW.restype = wintypes.DWORD
GetAppliedGPOListW.argtypes = [
    wintypes.DWORD,  # dwFlags : DWORD
    wintypes.LPCWSTR,  # pMachineName : LPCWSTR optional
    wintypes.HANDLE,  # pSidUser : PSID optional
    ctypes.c_void_p,  # pGuidExtension : GUID*
    ctypes.c_void_p,  # ppGPOList : GROUP_POLICY_OBJECTW** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USERENV.dll')
GetAppliedGPOListW = Fiddle::Function.new(
  lib['GetAppliedGPOListW'],
  [
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # pMachineName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # pSidUser : PSID optional
    Fiddle::TYPE_VOIDP,  # pGuidExtension : GUID*
    Fiddle::TYPE_VOIDP,  # ppGPOList : GROUP_POLICY_OBJECTW** out
  ],
  -Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "userenv")]
extern "system" {
    fn GetAppliedGPOListW(
        dwFlags: u32,  // DWORD
        pMachineName: *const u16,  // LPCWSTR optional
        pSidUser: *mut core::ffi::c_void,  // PSID optional
        pGuidExtension: *mut GUID,  // GUID*
        ppGPOList: *mut *mut GROUP_POLICY_OBJECTW  // GROUP_POLICY_OBJECTW** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("USERENV.dll", CharSet = CharSet.Unicode)]
public static extern uint GetAppliedGPOListW(uint dwFlags, [MarshalAs(UnmanagedType.LPWStr)] string pMachineName, IntPtr pSidUser, ref Guid pGuidExtension, IntPtr ppGPOList);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USERENV_GetAppliedGPOListW' -Namespace Win32 -PassThru
# $api::GetAppliedGPOListW(dwFlags, pMachineName, pSidUser, pGuidExtension, ppGPOList)

#uselib "USERENV.dll"
#func global GetAppliedGPOListW "GetAppliedGPOListW" wptr, wptr, wptr, wptr, wptr
; GetAppliedGPOListW dwFlags, pMachineName, pSidUser, varptr(pGuidExtension), varptr(ppGPOList)   ; 戻り値は stat
; dwFlags : DWORD -> "wptr"
; pMachineName : LPCWSTR optional -> "wptr"
; pSidUser : PSID optional -> "wptr"
; pGuidExtension : GUID* -> "wptr"
; ppGPOList : GROUP_POLICY_OBJECTW** out -> "wptr"
; ※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 "USERENV.dll"
#cfunc global GetAppliedGPOListW "GetAppliedGPOListW" int, wstr, sptr, var, var
; res = GetAppliedGPOListW(dwFlags, pMachineName, pSidUser, pGuidExtension, ppGPOList)
; dwFlags : DWORD -> "int"
; pMachineName : LPCWSTR optional -> "wstr"
; pSidUser : PSID optional -> "sptr"
; pGuidExtension : GUID* -> "var"
; ppGPOList : GROUP_POLICY_OBJECTW** 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。

; DWORD GetAppliedGPOListW(DWORD dwFlags, LPCWSTR pMachineName, PSID pSidUser, GUID* pGuidExtension, GROUP_POLICY_OBJECTW** ppGPOList)
#uselib "USERENV.dll"
#cfunc global GetAppliedGPOListW "GetAppliedGPOListW" int, wstr, intptr, var, var
; res = GetAppliedGPOListW(dwFlags, pMachineName, pSidUser, pGuidExtension, ppGPOList)
; dwFlags : DWORD -> "int"
; pMachineName : LPCWSTR optional -> "wstr"
; pSidUser : PSID optional -> "intptr"
; pGuidExtension : GUID* -> "var"
; ppGPOList : GROUP_POLICY_OBJECTW** 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 (
	userenv = windows.NewLazySystemDLL("USERENV.dll")
	procGetAppliedGPOListW = userenv.NewProc("GetAppliedGPOListW")
)

// dwFlags (DWORD), pMachineName (LPCWSTR optional), pSidUser (PSID optional), pGuidExtension (GUID*), ppGPOList (GROUP_POLICY_OBJECTW** out)
r1, _, err := procGetAppliedGPOListW.Call(
	uintptr(dwFlags),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pMachineName))),
	uintptr(pSidUser),
	uintptr(pGuidExtension),
	uintptr(ppGPOList),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetAppliedGPOListW(
  dwFlags: DWORD;   // DWORD
  pMachineName: PWideChar;   // LPCWSTR optional
  pSidUser: THandle;   // PSID optional
  pGuidExtension: PGUID;   // GUID*
  ppGPOList: Pointer   // GROUP_POLICY_OBJECTW** out
): DWORD; stdcall;
  external 'USERENV.dll' name 'GetAppliedGPOListW';

result := DllCall("USERENV\GetAppliedGPOListW"
    , "UInt", dwFlags   ; DWORD
    , "WStr", pMachineName   ; LPCWSTR optional
    , "Ptr", pSidUser   ; PSID optional
    , "Ptr", pGuidExtension   ; GUID*
    , "Ptr", ppGPOList   ; GROUP_POLICY_OBJECTW** out
    , "UInt")   ; return: DWORD

●GetAppliedGPOListW(dwFlags, pMachineName, pSidUser, pGuidExtension, ppGPOList) = DLL("USERENV.dll", "dword GetAppliedGPOListW(dword, char*, void*, void*, void*)")
# 呼び出し: GetAppliedGPOListW(dwFlags, pMachineName, pSidUser, pGuidExtension, ppGPOList)
# dwFlags : DWORD -> "dword"
# pMachineName : LPCWSTR optional -> "char*"
# pSidUser : PSID optional -> "void*"
# pGuidExtension : GUID* -> "void*"
# ppGPOList : GROUP_POLICY_OBJECTW** 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。