DhcpV4FailoverSetRelationship

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

DWORD DhcpV4FailoverSetRelationship(
    LPWSTR ServerIpAddress,   // optional
    DWORD Flags,
    DHCP_FAILOVER_RELATIONSHIP* pRelationship
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpV4FailoverSetRelationship(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPWSTR optional
    Flags As UInteger,   ' DWORD
    pRelationship As IntPtr   ' DHCP_FAILOVER_RELATIONSHIP*
) As UInteger
End Function

' ServerIpAddress : LPWSTR optional
' Flags : DWORD
' pRelationship : DHCP_FAILOVER_RELATIONSHIP*
Declare PtrSafe Function DhcpV4FailoverSetRelationship Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal Flags As Long, _
    ByVal pRelationship 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

DhcpV4FailoverSetRelationship = ctypes.windll.dhcpsapi.DhcpV4FailoverSetRelationship
DhcpV4FailoverSetRelationship.restype = wintypes.DWORD
DhcpV4FailoverSetRelationship.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPWSTR optional
    wintypes.DWORD,  # Flags : DWORD
    ctypes.c_void_p,  # pRelationship : DHCP_FAILOVER_RELATIONSHIP*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpV4FailoverSetRelationship = Fiddle::Function.new(
  lib['DhcpV4FailoverSetRelationship'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPWSTR optional
    -Fiddle::TYPE_INT,  # Flags : DWORD
    Fiddle::TYPE_VOIDP,  # pRelationship : DHCP_FAILOVER_RELATIONSHIP*
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpV4FailoverSetRelationship(
        ServerIpAddress: *mut u16,  // LPWSTR optional
        Flags: u32,  // DWORD
        pRelationship: *mut DHCP_FAILOVER_RELATIONSHIP  // DHCP_FAILOVER_RELATIONSHIP*
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpV4FailoverSetRelationship([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, uint Flags, IntPtr pRelationship);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpV4FailoverSetRelationship' -Namespace Win32 -PassThru
# $api::DhcpV4FailoverSetRelationship(ServerIpAddress, Flags, pRelationship)

#uselib "DHCPSAPI.dll"
#func global DhcpV4FailoverSetRelationship "DhcpV4FailoverSetRelationship" sptr, sptr, sptr
; DhcpV4FailoverSetRelationship ServerIpAddress, Flags, varptr(pRelationship)   ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; Flags : DWORD -> "sptr"
; pRelationship : DHCP_FAILOVER_RELATIONSHIP* -> "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 DhcpV4FailoverSetRelationship "DhcpV4FailoverSetRelationship" wstr, int, var
; res = DhcpV4FailoverSetRelationship(ServerIpAddress, Flags, pRelationship)
; ServerIpAddress : LPWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; pRelationship : DHCP_FAILOVER_RELATIONSHIP* -> "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 DhcpV4FailoverSetRelationship(LPWSTR ServerIpAddress, DWORD Flags, DHCP_FAILOVER_RELATIONSHIP* pRelationship)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpV4FailoverSetRelationship "DhcpV4FailoverSetRelationship" wstr, int, var
; res = DhcpV4FailoverSetRelationship(ServerIpAddress, Flags, pRelationship)
; ServerIpAddress : LPWSTR optional -> "wstr"
; Flags : DWORD -> "int"
; pRelationship : DHCP_FAILOVER_RELATIONSHIP* -> "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")
	procDhcpV4FailoverSetRelationship = dhcpsapi.NewProc("DhcpV4FailoverSetRelationship")
)

// ServerIpAddress (LPWSTR optional), Flags (DWORD), pRelationship (DHCP_FAILOVER_RELATIONSHIP*)
r1, _, err := procDhcpV4FailoverSetRelationship.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(Flags),
	uintptr(pRelationship),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpV4FailoverSetRelationship(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  Flags: DWORD;   // DWORD
  pRelationship: Pointer   // DHCP_FAILOVER_RELATIONSHIP*
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpV4FailoverSetRelationship';

result := DllCall("DHCPSAPI\DhcpV4FailoverSetRelationship"
    , "WStr", ServerIpAddress   ; LPWSTR optional
    , "UInt", Flags   ; DWORD
    , "Ptr", pRelationship   ; DHCP_FAILOVER_RELATIONSHIP*
    , "UInt")   ; return: DWORD

●DhcpV4FailoverSetRelationship(ServerIpAddress, Flags, pRelationship) = DLL("DHCPSAPI.dll", "dword DhcpV4FailoverSetRelationship(char*, dword, void*)")
# 呼び出し: DhcpV4FailoverSetRelationship(ServerIpAddress, Flags, pRelationship)
# ServerIpAddress : LPWSTR optional -> "char*"
# Flags : DWORD -> "dword"
# pRelationship : DHCP_FAILOVER_RELATIONSHIP* -> "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)。