NetGetDCName

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

DWORD NetGetDCName(
    LPCWSTR ServerName,   // optional
    LPCWSTR DomainName,   // optional
    BYTE** Buffer
);

<DllImport("NETAPI32.dll", ExactSpelling:=True)>
Public Shared Function NetGetDCName(
    <MarshalAs(UnmanagedType.LPWStr)> ServerName As String,   ' LPCWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> DomainName As String,   ' LPCWSTR optional
    Buffer As IntPtr   ' BYTE** out
) As UInteger
End Function

' ServerName : LPCWSTR optional
' DomainName : LPCWSTR optional
' Buffer : BYTE** out
Declare PtrSafe Function NetGetDCName Lib "netapi32" ( _
    ByVal ServerName As LongPtr, _
    ByVal DomainName As LongPtr, _
    ByVal Buffer 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

NetGetDCName = ctypes.windll.netapi32.NetGetDCName
NetGetDCName.restype = wintypes.DWORD
NetGetDCName.argtypes = [
    wintypes.LPCWSTR,  # ServerName : LPCWSTR optional
    wintypes.LPCWSTR,  # DomainName : LPCWSTR optional
    ctypes.c_void_p,  # Buffer : BYTE** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('NETAPI32.dll')
NetGetDCName = Fiddle::Function.new(
  lib['NetGetDCName'],
  [
    Fiddle::TYPE_VOIDP,  # ServerName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # DomainName : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # Buffer : BYTE** out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "netapi32")]
extern "system" {
    fn NetGetDCName(
        ServerName: *const u16,  // LPCWSTR optional
        DomainName: *const u16,  // LPCWSTR optional
        Buffer: *mut *mut u8  // BYTE** out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("NETAPI32.dll")]
public static extern uint NetGetDCName([MarshalAs(UnmanagedType.LPWStr)] string ServerName, [MarshalAs(UnmanagedType.LPWStr)] string DomainName, IntPtr Buffer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'NETAPI32_NetGetDCName' -Namespace Win32 -PassThru
# $api::NetGetDCName(ServerName, DomainName, Buffer)

#uselib "NETAPI32.dll"
#func global NetGetDCName "NetGetDCName" sptr, sptr, sptr
; NetGetDCName ServerName, DomainName, varptr(Buffer)   ; 戻り値は stat
; ServerName : LPCWSTR optional -> "sptr"
; DomainName : LPCWSTR optional -> "sptr"
; Buffer : BYTE** 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 NetGetDCName "NetGetDCName" wstr, wstr, var
; res = NetGetDCName(ServerName, DomainName, Buffer)
; ServerName : LPCWSTR optional -> "wstr"
; DomainName : LPCWSTR optional -> "wstr"
; Buffer : BYTE** 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 NetGetDCName(LPCWSTR ServerName, LPCWSTR DomainName, BYTE** Buffer)
#uselib "NETAPI32.dll"
#cfunc global NetGetDCName "NetGetDCName" wstr, wstr, var
; res = NetGetDCName(ServerName, DomainName, Buffer)
; ServerName : LPCWSTR optional -> "wstr"
; DomainName : LPCWSTR optional -> "wstr"
; Buffer : BYTE** 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")
	procNetGetDCName = netapi32.NewProc("NetGetDCName")
)

// ServerName (LPCWSTR optional), DomainName (LPCWSTR optional), Buffer (BYTE** out)
r1, _, err := procNetGetDCName.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(DomainName))),
	uintptr(Buffer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function NetGetDCName(
  ServerName: PWideChar;   // LPCWSTR optional
  DomainName: PWideChar;   // LPCWSTR optional
  Buffer: Pointer   // BYTE** out
): DWORD; stdcall;
  external 'NETAPI32.dll' name 'NetGetDCName';

result := DllCall("NETAPI32\NetGetDCName"
    , "WStr", ServerName   ; LPCWSTR optional
    , "WStr", DomainName   ; LPCWSTR optional
    , "Ptr", Buffer   ; BYTE** out
    , "UInt")   ; return: DWORD

●NetGetDCName(ServerName, DomainName, Buffer) = DLL("NETAPI32.dll", "dword NetGetDCName(char*, char*, void*)")
# 呼び出し: NetGetDCName(ServerName, DomainName, Buffer)
# ServerName : LPCWSTR optional -> "char*"
# DomainName : LPCWSTR optional -> "char*"
# Buffer : BYTE** 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)。