DhcpServerQueryDnsRegCredentials

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

DWORD DhcpServerQueryDnsRegCredentials(
    LPWSTR ServerIpAddress,   // optional
    DWORD UnameSize,
    LPWSTR Uname,
    DWORD DomainSize,
    LPWSTR Domain
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpServerQueryDnsRegCredentials(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPWSTR optional
    UnameSize As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> Uname As System.Text.StringBuilder,   ' LPWSTR out
    DomainSize As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> Domain As System.Text.StringBuilder   ' LPWSTR out
) As UInteger
End Function

' ServerIpAddress : LPWSTR optional
' UnameSize : DWORD
' Uname : LPWSTR out
' DomainSize : DWORD
' Domain : LPWSTR out
Declare PtrSafe Function DhcpServerQueryDnsRegCredentials Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal UnameSize As Long, _
    ByVal Uname As LongPtr, _
    ByVal DomainSize As Long, _
    ByVal Domain 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

DhcpServerQueryDnsRegCredentials = ctypes.windll.dhcpsapi.DhcpServerQueryDnsRegCredentials
DhcpServerQueryDnsRegCredentials.restype = wintypes.DWORD
DhcpServerQueryDnsRegCredentials.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPWSTR optional
    wintypes.DWORD,  # UnameSize : DWORD
    wintypes.LPWSTR,  # Uname : LPWSTR out
    wintypes.DWORD,  # DomainSize : DWORD
    wintypes.LPWSTR,  # Domain : LPWSTR out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpServerQueryDnsRegCredentials = Fiddle::Function.new(
  lib['DhcpServerQueryDnsRegCredentials'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPWSTR optional
    -Fiddle::TYPE_INT,  # UnameSize : DWORD
    Fiddle::TYPE_VOIDP,  # Uname : LPWSTR out
    -Fiddle::TYPE_INT,  # DomainSize : DWORD
    Fiddle::TYPE_VOIDP,  # Domain : LPWSTR out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpServerQueryDnsRegCredentials(
        ServerIpAddress: *mut u16,  // LPWSTR optional
        UnameSize: u32,  // DWORD
        Uname: *mut u16,  // LPWSTR out
        DomainSize: u32,  // DWORD
        Domain: *mut u16  // LPWSTR out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpServerQueryDnsRegCredentials([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, uint UnameSize, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder Uname, uint DomainSize, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder Domain);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpServerQueryDnsRegCredentials' -Namespace Win32 -PassThru
# $api::DhcpServerQueryDnsRegCredentials(ServerIpAddress, UnameSize, Uname, DomainSize, Domain)

#uselib "DHCPSAPI.dll"
#func global DhcpServerQueryDnsRegCredentials "DhcpServerQueryDnsRegCredentials" sptr, sptr, sptr, sptr, sptr
; DhcpServerQueryDnsRegCredentials ServerIpAddress, UnameSize, varptr(Uname), DomainSize, varptr(Domain)   ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; UnameSize : DWORD -> "sptr"
; Uname : LPWSTR out -> "sptr"
; DomainSize : DWORD -> "sptr"
; Domain : LPWSTR 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 "DHCPSAPI.dll"
#cfunc global DhcpServerQueryDnsRegCredentials "DhcpServerQueryDnsRegCredentials" wstr, int, var, int, var
; res = DhcpServerQueryDnsRegCredentials(ServerIpAddress, UnameSize, Uname, DomainSize, Domain)
; ServerIpAddress : LPWSTR optional -> "wstr"
; UnameSize : DWORD -> "int"
; Uname : LPWSTR out -> "var"
; DomainSize : DWORD -> "int"
; Domain : LPWSTR 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 DhcpServerQueryDnsRegCredentials(LPWSTR ServerIpAddress, DWORD UnameSize, LPWSTR Uname, DWORD DomainSize, LPWSTR Domain)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpServerQueryDnsRegCredentials "DhcpServerQueryDnsRegCredentials" wstr, int, var, int, var
; res = DhcpServerQueryDnsRegCredentials(ServerIpAddress, UnameSize, Uname, DomainSize, Domain)
; ServerIpAddress : LPWSTR optional -> "wstr"
; UnameSize : DWORD -> "int"
; Uname : LPWSTR out -> "var"
; DomainSize : DWORD -> "int"
; Domain : LPWSTR 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 (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpServerQueryDnsRegCredentials = dhcpsapi.NewProc("DhcpServerQueryDnsRegCredentials")
)

// ServerIpAddress (LPWSTR optional), UnameSize (DWORD), Uname (LPWSTR out), DomainSize (DWORD), Domain (LPWSTR out)
r1, _, err := procDhcpServerQueryDnsRegCredentials.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(UnameSize),
	uintptr(Uname),
	uintptr(DomainSize),
	uintptr(Domain),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpServerQueryDnsRegCredentials(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  UnameSize: DWORD;   // DWORD
  Uname: PWideChar;   // LPWSTR out
  DomainSize: DWORD;   // DWORD
  Domain: PWideChar   // LPWSTR out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpServerQueryDnsRegCredentials';

result := DllCall("DHCPSAPI\DhcpServerQueryDnsRegCredentials"
    , "WStr", ServerIpAddress   ; LPWSTR optional
    , "UInt", UnameSize   ; DWORD
    , "Ptr", Uname   ; LPWSTR out
    , "UInt", DomainSize   ; DWORD
    , "Ptr", Domain   ; LPWSTR out
    , "UInt")   ; return: DWORD

●DhcpServerQueryDnsRegCredentials(ServerIpAddress, UnameSize, Uname, DomainSize, Domain) = DLL("DHCPSAPI.dll", "dword DhcpServerQueryDnsRegCredentials(char*, dword, char*, dword, char*)")
# 呼び出し: DhcpServerQueryDnsRegCredentials(ServerIpAddress, UnameSize, Uname, DomainSize, Domain)
# ServerIpAddress : LPWSTR optional -> "char*"
# UnameSize : DWORD -> "dword"
# Uname : LPWSTR out -> "char*"
# DomainSize : DWORD -> "dword"
# Domain : LPWSTR out -> "char*"
# 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)。