NetUserGetGroups

// NETAPI32.dll
#include <windows.h>

DWORD NetUserGetGroups(
    LPCWSTR servername,   // optional
    LPCWSTR username,
    DWORD level,
    BYTE** bufptr,
    DWORD prefmaxlen,
    DWORD* entriesread,
    DWORD* totalentries
);

<DllImport("NETAPI32.dll", ExactSpelling:=True)>
Public Shared Function NetUserGetGroups(
    <MarshalAs(UnmanagedType.LPWStr)> servername As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> username As String,   ' LPCWSTR
    level As UInteger,   ' DWORD
    bufptr As IntPtr,   ' BYTE** out
    prefmaxlen As UInteger,   ' DWORD
    <Out> ByRef entriesread As UInteger,   ' DWORD* out
    <Out> ByRef totalentries As UInteger   ' DWORD* out
) As UInteger
End Function

' servername : LPCWSTR optional
' username : LPCWSTR
' level : DWORD
' bufptr : BYTE** out
' prefmaxlen : DWORD
' entriesread : DWORD* out
' totalentries : DWORD* out
Declare PtrSafe Function NetUserGetGroups Lib "netapi32" ( _
    ByVal servername As LongPtr, _
    ByVal username As LongPtr, _
    ByVal level As Long, _
    ByVal bufptr As LongPtr, _
    ByVal prefmaxlen As Long, _
    ByRef entriesread As Long, _
    ByRef totalentries 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

NetUserGetGroups = ctypes.windll.netapi32.NetUserGetGroups
NetUserGetGroups.restype = wintypes.DWORD
NetUserGetGroups.argtypes = [
    wintypes.LPCWSTR,  # servername : LPCWSTR optional
    wintypes.LPCWSTR,  # username : LPCWSTR
    wintypes.DWORD,  # level : DWORD
    ctypes.c_void_p,  # bufptr : BYTE** out
    wintypes.DWORD,  # prefmaxlen : DWORD
    ctypes.POINTER(wintypes.DWORD),  # entriesread : DWORD* out
    ctypes.POINTER(wintypes.DWORD),  # totalentries : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NETAPI32.dll')
NetUserGetGroups = Fiddle::Function.new(
  lib['NetUserGetGroups'],
  [
    Fiddle::TYPE_VOIDP,  # servername : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # username : LPCWSTR
    -Fiddle::TYPE_INT,  # level : DWORD
    Fiddle::TYPE_VOIDP,  # bufptr : BYTE** out
    -Fiddle::TYPE_INT,  # prefmaxlen : DWORD
    Fiddle::TYPE_VOIDP,  # entriesread : DWORD* out
    Fiddle::TYPE_VOIDP,  # totalentries : DWORD* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "netapi32")]
extern "system" {
    fn NetUserGetGroups(
        servername: *const u16,  // LPCWSTR optional
        username: *const u16,  // LPCWSTR
        level: u32,  // DWORD
        bufptr: *mut *mut u8,  // BYTE** out
        prefmaxlen: u32,  // DWORD
        entriesread: *mut u32,  // DWORD* out
        totalentries: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NETAPI32.dll")]
public static extern uint NetUserGetGroups([MarshalAs(UnmanagedType.LPWStr)] string servername, [MarshalAs(UnmanagedType.LPWStr)] string username, uint level, IntPtr bufptr, uint prefmaxlen, out uint entriesread, out uint totalentries);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NETAPI32_NetUserGetGroups' -Namespace Win32 -PassThru
# $api::NetUserGetGroups(servername, username, level, bufptr, prefmaxlen, entriesread, totalentries)

#uselib "NETAPI32.dll"
#func global NetUserGetGroups "NetUserGetGroups" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; NetUserGetGroups servername, username, level, varptr(bufptr), prefmaxlen, varptr(entriesread), varptr(totalentries)   ; 戻り値は stat
; servername : LPCWSTR optional -> "sptr"
; username : LPCWSTR -> "sptr"
; level : DWORD -> "sptr"
; bufptr : BYTE** out -> "sptr"
; prefmaxlen : DWORD -> "sptr"
; entriesread : DWORD* out -> "sptr"
; totalentries : DWORD* 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 "NETAPI32.dll"
#cfunc global NetUserGetGroups "NetUserGetGroups" wstr, wstr, int, var, int, var, var
; res = NetUserGetGroups(servername, username, level, bufptr, prefmaxlen, entriesread, totalentries)
; servername : LPCWSTR optional -> "wstr"
; username : LPCWSTR -> "wstr"
; level : DWORD -> "int"
; bufptr : BYTE** out -> "var"
; prefmaxlen : DWORD -> "int"
; entriesread : DWORD* out -> "var"
; totalentries : DWORD* 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 NetUserGetGroups(LPCWSTR servername, LPCWSTR username, DWORD level, BYTE** bufptr, DWORD prefmaxlen, DWORD* entriesread, DWORD* totalentries)
#uselib "NETAPI32.dll"
#cfunc global NetUserGetGroups "NetUserGetGroups" wstr, wstr, int, var, int, var, var
; res = NetUserGetGroups(servername, username, level, bufptr, prefmaxlen, entriesread, totalentries)
; servername : LPCWSTR optional -> "wstr"
; username : LPCWSTR -> "wstr"
; level : DWORD -> "int"
; bufptr : BYTE** out -> "var"
; prefmaxlen : DWORD -> "int"
; entriesread : DWORD* out -> "var"
; totalentries : DWORD* 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 (
	netapi32 = windows.NewLazySystemDLL("NETAPI32.dll")
	procNetUserGetGroups = netapi32.NewProc("NetUserGetGroups")
)

// servername (LPCWSTR optional), username (LPCWSTR), level (DWORD), bufptr (BYTE** out), prefmaxlen (DWORD), entriesread (DWORD* out), totalentries (DWORD* out)
r1, _, err := procNetUserGetGroups.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(servername))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(username))),
	uintptr(level),
	uintptr(bufptr),
	uintptr(prefmaxlen),
	uintptr(entriesread),
	uintptr(totalentries),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function NetUserGetGroups(
  servername: PWideChar;   // LPCWSTR optional
  username: PWideChar;   // LPCWSTR
  level: DWORD;   // DWORD
  bufptr: Pointer;   // BYTE** out
  prefmaxlen: DWORD;   // DWORD
  entriesread: Pointer;   // DWORD* out
  totalentries: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'NetUserGetGroups';

result := DllCall("NETAPI32\NetUserGetGroups"
    , "WStr", servername   ; LPCWSTR optional
    , "WStr", username   ; LPCWSTR
    , "UInt", level   ; DWORD
    , "Ptr", bufptr   ; BYTE** out
    , "UInt", prefmaxlen   ; DWORD
    , "Ptr", entriesread   ; DWORD* out
    , "Ptr", totalentries   ; DWORD* out
    , "UInt")   ; return: DWORD

●NetUserGetGroups(servername, username, level, bufptr, prefmaxlen, entriesread, totalentries) = DLL("NETAPI32.dll", "dword NetUserGetGroups(char*, char*, dword, void*, dword, void*, void*)")
# 呼び出し: NetUserGetGroups(servername, username, level, bufptr, prefmaxlen, entriesread, totalentries)
# servername : LPCWSTR optional -> "char*"
# username : LPCWSTR -> "char*"
# level : DWORD -> "dword"
# bufptr : BYTE** out -> "void*"
# prefmaxlen : DWORD -> "dword"
# entriesread : DWORD* out -> "void*"
# totalentries : DWORD* 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)。