GetAdaptersInfo

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

DWORD GetAdaptersInfo(
    IP_ADAPTER_INFO* AdapterInfo,   // optional
    DWORD* SizePointer
);

<DllImport("IPHLPAPI.dll", ExactSpelling:=True)>
Public Shared Function GetAdaptersInfo(
    AdapterInfo As IntPtr,   ' IP_ADAPTER_INFO* optional, out
    ByRef SizePointer As UInteger   ' DWORD* in/out
) As UInteger
End Function

' AdapterInfo : IP_ADAPTER_INFO* optional, out
' SizePointer : DWORD* in/out
Declare PtrSafe Function GetAdaptersInfo Lib "iphlpapi" ( _
    ByVal AdapterInfo As LongPtr, _
    ByRef SizePointer 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

GetAdaptersInfo = ctypes.windll.iphlpapi.GetAdaptersInfo
GetAdaptersInfo.restype = wintypes.DWORD
GetAdaptersInfo.argtypes = [
    ctypes.c_void_p,  # AdapterInfo : IP_ADAPTER_INFO* optional, out
    ctypes.POINTER(wintypes.DWORD),  # SizePointer : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IPHLPAPI.dll')
GetAdaptersInfo = Fiddle::Function.new(
  lib['GetAdaptersInfo'],
  [
    Fiddle::TYPE_VOIDP,  # AdapterInfo : IP_ADAPTER_INFO* optional, out
    Fiddle::TYPE_VOIDP,  # SizePointer : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "iphlpapi")]
extern "system" {
    fn GetAdaptersInfo(
        AdapterInfo: *mut IP_ADAPTER_INFO,  // IP_ADAPTER_INFO* optional, out
        SizePointer: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("IPHLPAPI.dll")]
public static extern uint GetAdaptersInfo(IntPtr AdapterInfo, ref uint SizePointer);
"@
$api = Add-Type -MemberDefinition $sig -Name 'IPHLPAPI_GetAdaptersInfo' -Namespace Win32 -PassThru
# $api::GetAdaptersInfo(AdapterInfo, SizePointer)

#uselib "IPHLPAPI.dll"
#func global GetAdaptersInfo "GetAdaptersInfo" sptr, sptr
; GetAdaptersInfo varptr(AdapterInfo), varptr(SizePointer)   ; 戻り値は stat
; AdapterInfo : IP_ADAPTER_INFO* optional, out -> "sptr"
; SizePointer : 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 "IPHLPAPI.dll"
#cfunc global GetAdaptersInfo "GetAdaptersInfo" var, var
; res = GetAdaptersInfo(AdapterInfo, SizePointer)
; AdapterInfo : IP_ADAPTER_INFO* optional, out -> "var"
; SizePointer : 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 GetAdaptersInfo(IP_ADAPTER_INFO* AdapterInfo, DWORD* SizePointer)
#uselib "IPHLPAPI.dll"
#cfunc global GetAdaptersInfo "GetAdaptersInfo" var, var
; res = GetAdaptersInfo(AdapterInfo, SizePointer)
; AdapterInfo : IP_ADAPTER_INFO* optional, out -> "var"
; SizePointer : 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 (
	iphlpapi = windows.NewLazySystemDLL("IPHLPAPI.dll")
	procGetAdaptersInfo = iphlpapi.NewProc("GetAdaptersInfo")
)

// AdapterInfo (IP_ADAPTER_INFO* optional, out), SizePointer (DWORD* in/out)
r1, _, err := procGetAdaptersInfo.Call(
	uintptr(AdapterInfo),
	uintptr(SizePointer),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function GetAdaptersInfo(
  AdapterInfo: Pointer;   // IP_ADAPTER_INFO* optional, out
  SizePointer: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'IPHLPAPI.dll' name 'GetAdaptersInfo';

result := DllCall("IPHLPAPI\GetAdaptersInfo"
    , "Ptr", AdapterInfo   ; IP_ADAPTER_INFO* optional, out
    , "Ptr", SizePointer   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●GetAdaptersInfo(AdapterInfo, SizePointer) = DLL("IPHLPAPI.dll", "dword GetAdaptersInfo(void*, void*)")
# 呼び出し: GetAdaptersInfo(AdapterInfo, SizePointer)
# AdapterInfo : IP_ADAPTER_INFO* optional, out -> "void*"
# SizePointer : 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)。