DhcpGetVersion

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

DWORD DhcpGetVersion(
    LPWSTR ServerIpAddress,   // optional
    DWORD* MajorVersion,
    DWORD* MinorVersion
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpGetVersion(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPWSTR optional
    ByRef MajorVersion As UInteger,   ' DWORD* in/out
    ByRef MinorVersion As UInteger   ' DWORD* in/out
) As UInteger
End Function

' ServerIpAddress : LPWSTR optional
' MajorVersion : DWORD* in/out
' MinorVersion : DWORD* in/out
Declare PtrSafe Function DhcpGetVersion Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByRef MajorVersion As Long, _
    ByRef MinorVersion 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

DhcpGetVersion = ctypes.windll.dhcpsapi.DhcpGetVersion
DhcpGetVersion.restype = wintypes.DWORD
DhcpGetVersion.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPWSTR optional
    ctypes.POINTER(wintypes.DWORD),  # MajorVersion : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # MinorVersion : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpGetVersion = Fiddle::Function.new(
  lib['DhcpGetVersion'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # MajorVersion : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # MinorVersion : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

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

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

#uselib "DHCPSAPI.dll"
#func global DhcpGetVersion "DhcpGetVersion" sptr, sptr, sptr
; DhcpGetVersion ServerIpAddress, varptr(MajorVersion), varptr(MinorVersion)   ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; MajorVersion : DWORD* in/out -> "sptr"
; MinorVersion : DWORD* 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 DhcpGetVersion "DhcpGetVersion" wstr, var, var
; res = DhcpGetVersion(ServerIpAddress, MajorVersion, MinorVersion)
; ServerIpAddress : LPWSTR optional -> "wstr"
; MajorVersion : DWORD* in/out -> "var"
; MinorVersion : DWORD* 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 DhcpGetVersion(LPWSTR ServerIpAddress, DWORD* MajorVersion, DWORD* MinorVersion)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpGetVersion "DhcpGetVersion" wstr, var, var
; res = DhcpGetVersion(ServerIpAddress, MajorVersion, MinorVersion)
; ServerIpAddress : LPWSTR optional -> "wstr"
; MajorVersion : DWORD* in/out -> "var"
; MinorVersion : DWORD* 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")
	procDhcpGetVersion = dhcpsapi.NewProc("DhcpGetVersion")
)

// ServerIpAddress (LPWSTR optional), MajorVersion (DWORD* in/out), MinorVersion (DWORD* in/out)
r1, _, err := procDhcpGetVersion.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(MajorVersion),
	uintptr(MinorVersion),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpGetVersion(
  ServerIpAddress: PWideChar;   // LPWSTR optional
  MajorVersion: Pointer;   // DWORD* in/out
  MinorVersion: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpGetVersion';

result := DllCall("DHCPSAPI\DhcpGetVersion"
    , "WStr", ServerIpAddress   ; LPWSTR optional
    , "Ptr", MajorVersion   ; DWORD* in/out
    , "Ptr", MinorVersion   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●DhcpGetVersion(ServerIpAddress, MajorVersion, MinorVersion) = DLL("DHCPSAPI.dll", "dword DhcpGetVersion(char*, void*, void*)")
# 呼び出し: DhcpGetVersion(ServerIpAddress, MajorVersion, MinorVersion)
# ServerIpAddress : LPWSTR optional -> "char*"
# MajorVersion : DWORD* in/out -> "void*"
# MinorVersion : DWORD* 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)。