GetNetworkParams

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

WIN32_ERROR GetNetworkParams(
    FIXED_INFO_W2KSP1* pFixedInfo,   // optional
    DWORD* pOutBufLen
);

<DllImport("IPHLPAPI.dll", ExactSpelling:=True)>
Public Shared Function GetNetworkParams(
    pFixedInfo As IntPtr,   ' FIXED_INFO_W2KSP1* optional, out
    ByRef pOutBufLen As UInteger   ' DWORD* in/out
) As UInteger
End Function

' pFixedInfo : FIXED_INFO_W2KSP1* optional, out
' pOutBufLen : DWORD* in/out
Declare PtrSafe Function GetNetworkParams Lib "iphlpapi" ( _
    ByVal pFixedInfo As LongPtr, _
    ByRef pOutBufLen 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

GetNetworkParams = ctypes.windll.iphlpapi.GetNetworkParams
GetNetworkParams.restype = wintypes.DWORD
GetNetworkParams.argtypes = [
    ctypes.c_void_p,  # pFixedInfo : FIXED_INFO_W2KSP1* optional, out
    ctypes.POINTER(wintypes.DWORD),  # pOutBufLen : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('IPHLPAPI.dll')
GetNetworkParams = Fiddle::Function.new(
  lib['GetNetworkParams'],
  [
    Fiddle::TYPE_VOIDP,  # pFixedInfo : FIXED_INFO_W2KSP1* optional, out
    Fiddle::TYPE_VOIDP,  # pOutBufLen : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "iphlpapi")]
extern "system" {
    fn GetNetworkParams(
        pFixedInfo: *mut FIXED_INFO_W2KSP1,  // FIXED_INFO_W2KSP1* optional, out
        pOutBufLen: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

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

#uselib "IPHLPAPI.dll"
#func global GetNetworkParams "GetNetworkParams" sptr, sptr
; GetNetworkParams varptr(pFixedInfo), varptr(pOutBufLen)   ; 戻り値は stat
; pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> "sptr"
; pOutBufLen : 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。

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

var (
	iphlpapi = windows.NewLazySystemDLL("IPHLPAPI.dll")
	procGetNetworkParams = iphlpapi.NewProc("GetNetworkParams")
)

// pFixedInfo (FIXED_INFO_W2KSP1* optional, out), pOutBufLen (DWORD* in/out)
r1, _, err := procGetNetworkParams.Call(
	uintptr(pFixedInfo),
	uintptr(pOutBufLen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // WIN32_ERROR

function GetNetworkParams(
  pFixedInfo: Pointer;   // FIXED_INFO_W2KSP1* optional, out
  pOutBufLen: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'IPHLPAPI.dll' name 'GetNetworkParams';

result := DllCall("IPHLPAPI\GetNetworkParams"
    , "Ptr", pFixedInfo   ; FIXED_INFO_W2KSP1* optional, out
    , "Ptr", pOutBufLen   ; DWORD* in/out
    , "UInt")   ; return: WIN32_ERROR

●GetNetworkParams(pFixedInfo, pOutBufLen) = DLL("IPHLPAPI.dll", "dword GetNetworkParams(void*, void*)")
# 呼び出し: GetNetworkParams(pFixedInfo, pOutBufLen)
# pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> "void*"
# pOutBufLen : 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)。

const std = @import("std");

extern "iphlpapi" fn GetNetworkParams(
    pFixedInfo: [*c]FIXED_INFO_W2KSP1, // FIXED_INFO_W2KSP1* optional, out
    pOutBufLen: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) u32;

proc GetNetworkParams(
    pFixedInfo: ptr FIXED_INFO_W2KSP1,  # FIXED_INFO_W2KSP1* optional, out
    pOutBufLen: ptr uint32  # DWORD* in/out
): uint32 {.importc: "GetNetworkParams", stdcall, dynlib: "IPHLPAPI.dll".}

pragma(lib, "iphlpapi");
extern(Windows)
uint GetNetworkParams(
    FIXED_INFO_W2KSP1* pFixedInfo,   // FIXED_INFO_W2KSP1* optional, out
    uint* pOutBufLen   // DWORD* in/out
);

ccall((:GetNetworkParams, "IPHLPAPI.dll"), stdcall, UInt32,
      (Ptr{FIXED_INFO_W2KSP1}, Ptr{UInt32}),
      pFixedInfo, pOutBufLen)
# pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> Ptr{FIXED_INFO_W2KSP1}
# pOutBufLen : DWORD* in/out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t GetNetworkParams(
    void* pFixedInfo,
    uint32_t* pOutBufLen);
]]
local iphlpapi = ffi.load("iphlpapi")
-- iphlpapi.GetNetworkParams(pFixedInfo, pOutBufLen)
-- pFixedInfo : FIXED_INFO_W2KSP1* optional, out
-- pOutBufLen : DWORD* in/out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。

const koffi = require('koffi');
const lib = koffi.load('IPHLPAPI.dll');
const GetNetworkParams = lib.func('__stdcall', 'GetNetworkParams', 'uint32_t', ['void *', 'uint32_t *']);
// GetNetworkParams(pFixedInfo, pOutBufLen)
// pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> 'void *'
// pOutBufLen : DWORD* in/out -> 'uint32_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。

const lib = Deno.dlopen("IPHLPAPI.dll", {
  GetNetworkParams: { parameters: ["pointer", "pointer"], result: "u32" },
});
// lib.symbols.GetNetworkParams(pFixedInfo, pOutBufLen)
// pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> "pointer"
// pOutBufLen : DWORD* in/out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
uint32_t GetNetworkParams(
    void* pFixedInfo,
    uint32_t* pOutBufLen);
C, "IPHLPAPI.dll");
// $ffi->GetNetworkParams(pFixedInfo, pOutBufLen);
// pFixedInfo : FIXED_INFO_W2KSP1* optional, out
// pOutBufLen : DWORD* in/out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。

import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;

public interface Iphlpapi extends StdCallLibrary {
    Iphlpapi INSTANCE = Native.load("iphlpapi", Iphlpapi.class);
    int GetNetworkParams(
        Pointer pFixedInfo,   // FIXED_INFO_W2KSP1* optional, out
        IntByReference pOutBufLen   // DWORD* in/out
    );
}

@[Link("iphlpapi")]
lib LibIPHLPAPI
  fun GetNetworkParams = GetNetworkParams(
    pFixedInfo : FIXED_INFO_W2KSP1*,   # FIXED_INFO_W2KSP1* optional, out
    pOutBufLen : UInt32*   # DWORD* in/out
  ) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。

import 'dart:ffi';
import 'package:ffi/ffi.dart';

typedef GetNetworkParamsNative = Uint32 Function(Pointer<Void>, Pointer<Uint32>);
typedef GetNetworkParamsDart = int Function(Pointer<Void>, Pointer<Uint32>);
final GetNetworkParams = DynamicLibrary.open('IPHLPAPI.dll')
    .lookupFunction<GetNetworkParamsNative, GetNetworkParamsDart>('GetNetworkParams');
// pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> Pointer<Void>
// pOutBufLen : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function GetNetworkParams(
  pFixedInfo: Pointer;   // FIXED_INFO_W2KSP1* optional, out
  pOutBufLen: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'IPHLPAPI.dll' name 'GetNetworkParams';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "GetNetworkParams"
  c_GetNetworkParams :: Ptr () -> Ptr Word32 -> IO Word32
-- pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> Ptr ()
-- pOutBufLen : DWORD* in/out -> Ptr Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。

open Ctypes
open Foreign

let getnetworkparams =
  foreign "GetNetworkParams"
    ((ptr void) @-> (ptr uint32_t) @-> returning uint32_t)
(* pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> (ptr void) *)
(* pOutBufLen : DWORD* in/out -> (ptr uint32_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)

(cffi:define-foreign-library iphlpapi (t "IPHLPAPI.dll"))
(cffi:use-foreign-library iphlpapi)

(cffi:defcfun ("GetNetworkParams" get-network-params :convention :stdcall) :uint32
  (p-fixed-info :pointer)   ; FIXED_INFO_W2KSP1* optional, out
  (p-out-buf-len :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $GetNetworkParams = Win32::API::More->new('IPHLPAPI',
    'DWORD GetNetworkParams(LPVOID pFixedInfo, LPVOID pOutBufLen)');
# my $ret = $GetNetworkParams->Call($pFixedInfo, $pOutBufLen);
# pFixedInfo : FIXED_INFO_W2KSP1* optional, out -> LPVOID
# pOutBufLen : DWORD* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。