DhcpRemoveOption

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

DWORD DhcpRemoveOption(
    LPCWSTR ServerIpAddress,   // optional
    DWORD OptionID
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpRemoveOption(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPCWSTR optional
    OptionID As UInteger   ' DWORD
) As UInteger
End Function

' ServerIpAddress : LPCWSTR optional
' OptionID : DWORD
Declare PtrSafe Function DhcpRemoveOption Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal OptionID 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

DhcpRemoveOption = ctypes.windll.dhcpsapi.DhcpRemoveOption
DhcpRemoveOption.restype = wintypes.DWORD
DhcpRemoveOption.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPCWSTR optional
    wintypes.DWORD,  # OptionID : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpRemoveOption = Fiddle::Function.new(
  lib['DhcpRemoveOption'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPCWSTR optional
    -Fiddle::TYPE_INT,  # OptionID : DWORD
  ],
  -Fiddle::TYPE_INT)

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

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

#uselib "DHCPSAPI.dll"
#func global DhcpRemoveOption "DhcpRemoveOption" sptr, sptr
; DhcpRemoveOption ServerIpAddress, OptionID   ; 戻り値は stat
; ServerIpAddress : LPCWSTR optional -> "sptr"
; OptionID : DWORD -> "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 DhcpRemoveOption "DhcpRemoveOption" wstr, int
; res = DhcpRemoveOption(ServerIpAddress, OptionID)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; OptionID : DWORD -> "int"

; DWORD DhcpRemoveOption(LPCWSTR ServerIpAddress, DWORD OptionID)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpRemoveOption "DhcpRemoveOption" wstr, int
; res = DhcpRemoveOption(ServerIpAddress, OptionID)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; OptionID : DWORD -> "int"

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpRemoveOption = dhcpsapi.NewProc("DhcpRemoveOption")
)

// ServerIpAddress (LPCWSTR optional), OptionID (DWORD)
r1, _, err := procDhcpRemoveOption.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(OptionID),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpRemoveOption(
  ServerIpAddress: PWideChar;   // LPCWSTR optional
  OptionID: DWORD   // DWORD
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpRemoveOption';

result := DllCall("DHCPSAPI\DhcpRemoveOption"
    , "WStr", ServerIpAddress   ; LPCWSTR optional
    , "UInt", OptionID   ; DWORD
    , "UInt")   ; return: DWORD

●DhcpRemoveOption(ServerIpAddress, OptionID) = DLL("DHCPSAPI.dll", "dword DhcpRemoveOption(char*, dword)")
# 呼び出し: DhcpRemoveOption(ServerIpAddress, OptionID)
# ServerIpAddress : LPCWSTR optional -> "char*"
# OptionID : DWORD -> "dword"
# 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)。