DhcpGetServerBindingInfo

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

DWORD DhcpGetServerBindingInfo(
    LPCWSTR ServerIpAddress,   // optional
    DWORD Flags,
    DHCP_BIND_ELEMENT_ARRAY** BindElementsInfo
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpGetServerBindingInfo(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPCWSTR optional
    Flags As UInteger,   ' DWORD
    BindElementsInfo As IntPtr   ' DHCP_BIND_ELEMENT_ARRAY** in/out
) As UInteger
End Function

' ServerIpAddress : LPCWSTR optional
' Flags : DWORD
' BindElementsInfo : DHCP_BIND_ELEMENT_ARRAY** in/out
Declare PtrSafe Function DhcpGetServerBindingInfo Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal Flags As Long, _
    ByVal BindElementsInfo 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

DhcpGetServerBindingInfo = ctypes.windll.dhcpsapi.DhcpGetServerBindingInfo
DhcpGetServerBindingInfo.restype = wintypes.DWORD
DhcpGetServerBindingInfo.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPCWSTR optional
    wintypes.DWORD,  # Flags : DWORD
    ctypes.c_void_p,  # BindElementsInfo : DHCP_BIND_ELEMENT_ARRAY** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpGetServerBindingInfo = Fiddle::Function.new(
  lib['DhcpGetServerBindingInfo'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPCWSTR optional
    -Fiddle::TYPE_INT,  # Flags : DWORD
    Fiddle::TYPE_VOIDP,  # BindElementsInfo : DHCP_BIND_ELEMENT_ARRAY** in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpGetServerBindingInfo(
        ServerIpAddress: *const u16,  // LPCWSTR optional
        Flags: u32,  // DWORD
        BindElementsInfo: *mut *mut DHCP_BIND_ELEMENT_ARRAY  // DHCP_BIND_ELEMENT_ARRAY** in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpGetServerBindingInfo([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, uint Flags, IntPtr BindElementsInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpGetServerBindingInfo' -Namespace Win32 -PassThru
# $api::DhcpGetServerBindingInfo(ServerIpAddress, Flags, BindElementsInfo)

#uselib "DHCPSAPI.dll"
#func global DhcpGetServerBindingInfo "DhcpGetServerBindingInfo" sptr, sptr, sptr
; DhcpGetServerBindingInfo ServerIpAddress, Flags, varptr(BindElementsInfo)   ; 戻り値は stat
; ServerIpAddress : LPCWSTR optional -> "sptr"
; Flags : DWORD -> "sptr"
; BindElementsInfo : DHCP_BIND_ELEMENT_ARRAY** 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 "DHCPSAPI.dll"
#cfunc global DhcpGetServerBindingInfo "DhcpGetServerBindingInfo" wstr, int, var
; res = DhcpGetServerBindingInfo(ServerIpAddress, Flags, BindElementsInfo)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; BindElementsInfo : DHCP_BIND_ELEMENT_ARRAY** 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。

; DWORD DhcpGetServerBindingInfo(LPCWSTR ServerIpAddress, DWORD Flags, DHCP_BIND_ELEMENT_ARRAY** BindElementsInfo)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpGetServerBindingInfo "DhcpGetServerBindingInfo" wstr, int, var
; res = DhcpGetServerBindingInfo(ServerIpAddress, Flags, BindElementsInfo)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; BindElementsInfo : DHCP_BIND_ELEMENT_ARRAY** 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 (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpGetServerBindingInfo = dhcpsapi.NewProc("DhcpGetServerBindingInfo")
)

// ServerIpAddress (LPCWSTR optional), Flags (DWORD), BindElementsInfo (DHCP_BIND_ELEMENT_ARRAY** in/out)
r1, _, err := procDhcpGetServerBindingInfo.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(Flags),
	uintptr(BindElementsInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpGetServerBindingInfo(
  ServerIpAddress: PWideChar;   // LPCWSTR optional
  Flags: DWORD;   // DWORD
  BindElementsInfo: Pointer   // DHCP_BIND_ELEMENT_ARRAY** in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpGetServerBindingInfo';

result := DllCall("DHCPSAPI\DhcpGetServerBindingInfo"
    , "WStr", ServerIpAddress   ; LPCWSTR optional
    , "UInt", Flags   ; DWORD
    , "Ptr", BindElementsInfo   ; DHCP_BIND_ELEMENT_ARRAY** in/out
    , "UInt")   ; return: DWORD

●DhcpGetServerBindingInfo(ServerIpAddress, Flags, BindElementsInfo) = DLL("DHCPSAPI.dll", "dword DhcpGetServerBindingInfo(char*, dword, void*)")
# 呼び出し: DhcpGetServerBindingInfo(ServerIpAddress, Flags, BindElementsInfo)
# ServerIpAddress : LPCWSTR optional -> "char*"
# Flags : DWORD -> "dword"
# BindElementsInfo : DHCP_BIND_ELEMENT_ARRAY** 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)。