DnsConnectionGetProxyInfo

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

DWORD DnsConnectionGetProxyInfo(
    LPCWSTR pwszConnectionName,
    DNS_CONNECTION_PROXY_TYPE Type,
    DNS_CONNECTION_PROXY_INFO* pProxyInfo
);

<DllImport("DNSAPI.dll", ExactSpelling:=True)>
Public Shared Function DnsConnectionGetProxyInfo(
    <MarshalAs(UnmanagedType.LPWStr)> pwszConnectionName As String,   ' LPCWSTR
    Type As Integer,   ' DNS_CONNECTION_PROXY_TYPE
    pProxyInfo As IntPtr   ' DNS_CONNECTION_PROXY_INFO* out
) As UInteger
End Function

' pwszConnectionName : LPCWSTR
' Type : DNS_CONNECTION_PROXY_TYPE
' pProxyInfo : DNS_CONNECTION_PROXY_INFO* out
Declare PtrSafe Function DnsConnectionGetProxyInfo Lib "dnsapi" ( _
    ByVal pwszConnectionName As LongPtr, _
    ByVal Type As Long, _
    ByVal pProxyInfo 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

DnsConnectionGetProxyInfo = ctypes.windll.dnsapi.DnsConnectionGetProxyInfo
DnsConnectionGetProxyInfo.restype = wintypes.DWORD
DnsConnectionGetProxyInfo.argtypes = [
    wintypes.LPCWSTR,  # pwszConnectionName : LPCWSTR
    ctypes.c_int,  # Type : DNS_CONNECTION_PROXY_TYPE
    ctypes.c_void_p,  # pProxyInfo : DNS_CONNECTION_PROXY_INFO* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DNSAPI.dll')
DnsConnectionGetProxyInfo = Fiddle::Function.new(
  lib['DnsConnectionGetProxyInfo'],
  [
    Fiddle::TYPE_VOIDP,  # pwszConnectionName : LPCWSTR
    Fiddle::TYPE_INT,  # Type : DNS_CONNECTION_PROXY_TYPE
    Fiddle::TYPE_VOIDP,  # pProxyInfo : DNS_CONNECTION_PROXY_INFO* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dnsapi")]
extern "system" {
    fn DnsConnectionGetProxyInfo(
        pwszConnectionName: *const u16,  // LPCWSTR
        Type: i32,  // DNS_CONNECTION_PROXY_TYPE
        pProxyInfo: *mut DNS_CONNECTION_PROXY_INFO  // DNS_CONNECTION_PROXY_INFO* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DNSAPI.dll")]
public static extern uint DnsConnectionGetProxyInfo([MarshalAs(UnmanagedType.LPWStr)] string pwszConnectionName, int Type, IntPtr pProxyInfo);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DNSAPI_DnsConnectionGetProxyInfo' -Namespace Win32 -PassThru
# $api::DnsConnectionGetProxyInfo(pwszConnectionName, Type, pProxyInfo)

#uselib "DNSAPI.dll"
#func global DnsConnectionGetProxyInfo "DnsConnectionGetProxyInfo" sptr, sptr, sptr
; DnsConnectionGetProxyInfo pwszConnectionName, Type, varptr(pProxyInfo)   ; 戻り値は stat
; pwszConnectionName : LPCWSTR -> "sptr"
; Type : DNS_CONNECTION_PROXY_TYPE -> "sptr"
; pProxyInfo : DNS_CONNECTION_PROXY_INFO* 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 (
	dnsapi = windows.NewLazySystemDLL("DNSAPI.dll")
	procDnsConnectionGetProxyInfo = dnsapi.NewProc("DnsConnectionGetProxyInfo")
)

// pwszConnectionName (LPCWSTR), Type (DNS_CONNECTION_PROXY_TYPE), pProxyInfo (DNS_CONNECTION_PROXY_INFO* out)
r1, _, err := procDnsConnectionGetProxyInfo.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszConnectionName))),
	uintptr(Type),
	uintptr(pProxyInfo),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DnsConnectionGetProxyInfo(
  pwszConnectionName: PWideChar;   // LPCWSTR
  Type: Integer;   // DNS_CONNECTION_PROXY_TYPE
  pProxyInfo: Pointer   // DNS_CONNECTION_PROXY_INFO* out
): DWORD; stdcall;
  external 'DNSAPI.dll' name 'DnsConnectionGetProxyInfo';

result := DllCall("DNSAPI\DnsConnectionGetProxyInfo"
    , "WStr", pwszConnectionName   ; LPCWSTR
    , "Int", Type   ; DNS_CONNECTION_PROXY_TYPE
    , "Ptr", pProxyInfo   ; DNS_CONNECTION_PROXY_INFO* out
    , "UInt")   ; return: DWORD

●DnsConnectionGetProxyInfo(pwszConnectionName, Type, pProxyInfo) = DLL("DNSAPI.dll", "dword DnsConnectionGetProxyInfo(char*, int, void*)")
# 呼び出し: DnsConnectionGetProxyInfo(pwszConnectionName, Type, pProxyInfo)
# pwszConnectionName : LPCWSTR -> "char*"
# Type : DNS_CONNECTION_PROXY_TYPE -> "int"
# pProxyInfo : DNS_CONNECTION_PROXY_INFO* 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 "dnsapi" fn DnsConnectionGetProxyInfo(
    pwszConnectionName: [*c]const u16, // LPCWSTR
    Type: i32, // DNS_CONNECTION_PROXY_TYPE
    pProxyInfo: [*c]DNS_CONNECTION_PROXY_INFO // DNS_CONNECTION_PROXY_INFO* out
) callconv(std.os.windows.WINAPI) u32;

proc DnsConnectionGetProxyInfo(
    pwszConnectionName: WideCString,  # LPCWSTR
    Type: int32,  # DNS_CONNECTION_PROXY_TYPE
    pProxyInfo: ptr DNS_CONNECTION_PROXY_INFO  # DNS_CONNECTION_PROXY_INFO* out
): uint32 {.importc: "DnsConnectionGetProxyInfo", stdcall, dynlib: "DNSAPI.dll".}

pragma(lib, "dnsapi");
extern(Windows)
uint DnsConnectionGetProxyInfo(
    const(wchar)* pwszConnectionName,   // LPCWSTR
    int Type,   // DNS_CONNECTION_PROXY_TYPE
    DNS_CONNECTION_PROXY_INFO* pProxyInfo   // DNS_CONNECTION_PROXY_INFO* out
);

ccall((:DnsConnectionGetProxyInfo, "DNSAPI.dll"), stdcall, UInt32,
      (Cwstring, Int32, Ptr{DNS_CONNECTION_PROXY_INFO}),
      pwszConnectionName, Type, pProxyInfo)
# pwszConnectionName : LPCWSTR -> Cwstring
# Type : DNS_CONNECTION_PROXY_TYPE -> Int32
# pProxyInfo : DNS_CONNECTION_PROXY_INFO* out -> Ptr{DNS_CONNECTION_PROXY_INFO}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DnsConnectionGetProxyInfo(
    const uint16_t* pwszConnectionName,
    int32_t Type,
    void* pProxyInfo);
]]
local dnsapi = ffi.load("dnsapi")
-- dnsapi.DnsConnectionGetProxyInfo(pwszConnectionName, Type, pProxyInfo)
-- pwszConnectionName : LPCWSTR
-- Type : DNS_CONNECTION_PROXY_TYPE
-- pProxyInfo : DNS_CONNECTION_PROXY_INFO* 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('DNSAPI.dll');
const DnsConnectionGetProxyInfo = lib.func('__stdcall', 'DnsConnectionGetProxyInfo', 'uint32_t', ['str16', 'int32_t', 'void *']);
// DnsConnectionGetProxyInfo(pwszConnectionName, Type, pProxyInfo)
// pwszConnectionName : LPCWSTR -> 'str16'
// Type : DNS_CONNECTION_PROXY_TYPE -> 'int32_t'
// pProxyInfo : DNS_CONNECTION_PROXY_INFO* out -> 'void *'
// 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("DNSAPI.dll", {
  DnsConnectionGetProxyInfo: { parameters: ["buffer", "i32", "pointer"], result: "u32" },
});
// lib.symbols.DnsConnectionGetProxyInfo(pwszConnectionName, Type, pProxyInfo)
// pwszConnectionName : LPCWSTR -> "buffer"
// Type : DNS_CONNECTION_PROXY_TYPE -> "i32"
// pProxyInfo : DNS_CONNECTION_PROXY_INFO* 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 DnsConnectionGetProxyInfo(
    const uint16_t* pwszConnectionName,
    int32_t Type,
    void* pProxyInfo);
C, "DNSAPI.dll");
// $ffi->DnsConnectionGetProxyInfo(pwszConnectionName, Type, pProxyInfo);
// pwszConnectionName : LPCWSTR
// Type : DNS_CONNECTION_PROXY_TYPE
// pProxyInfo : DNS_CONNECTION_PROXY_INFO* 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 Dnsapi extends StdCallLibrary {
    Dnsapi INSTANCE = Native.load("dnsapi", Dnsapi.class);
    int DnsConnectionGetProxyInfo(
        WString pwszConnectionName,   // LPCWSTR
        int Type,   // DNS_CONNECTION_PROXY_TYPE
        Pointer pProxyInfo   // DNS_CONNECTION_PROXY_INFO* out
    );
}

@[Link("dnsapi")]
lib LibDNSAPI
  fun DnsConnectionGetProxyInfo = DnsConnectionGetProxyInfo(
    pwszConnectionName : UInt16*,   # LPCWSTR
    Type : Int32,   # DNS_CONNECTION_PROXY_TYPE
    pProxyInfo : DNS_CONNECTION_PROXY_INFO*   # DNS_CONNECTION_PROXY_INFO* 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 DnsConnectionGetProxyInfoNative = Uint32 Function(Pointer<Utf16>, Int32, Pointer<Void>);
typedef DnsConnectionGetProxyInfoDart = int Function(Pointer<Utf16>, int, Pointer<Void>);
final DnsConnectionGetProxyInfo = DynamicLibrary.open('DNSAPI.dll')
    .lookupFunction<DnsConnectionGetProxyInfoNative, DnsConnectionGetProxyInfoDart>('DnsConnectionGetProxyInfo');
// pwszConnectionName : LPCWSTR -> Pointer<Utf16>
// Type : DNS_CONNECTION_PROXY_TYPE -> Int32
// pProxyInfo : DNS_CONNECTION_PROXY_INFO* out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DnsConnectionGetProxyInfo(
  pwszConnectionName: PWideChar;   // LPCWSTR
  Type: Integer;   // DNS_CONNECTION_PROXY_TYPE
  pProxyInfo: Pointer   // DNS_CONNECTION_PROXY_INFO* out
): DWORD; stdcall;
  external 'DNSAPI.dll' name 'DnsConnectionGetProxyInfo';

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

foreign import stdcall safe "DnsConnectionGetProxyInfo"
  c_DnsConnectionGetProxyInfo :: CWString -> Int32 -> Ptr () -> IO Word32
-- pwszConnectionName : LPCWSTR -> CWString
-- Type : DNS_CONNECTION_PROXY_TYPE -> Int32
-- pProxyInfo : DNS_CONNECTION_PROXY_INFO* out -> Ptr ()
-- 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 dnsconnectiongetproxyinfo =
  foreign "DnsConnectionGetProxyInfo"
    ((ptr uint16_t) @-> int32_t @-> (ptr void) @-> returning uint32_t)
(* pwszConnectionName : LPCWSTR -> (ptr uint16_t) *)
(* Type : DNS_CONNECTION_PROXY_TYPE -> int32_t *)
(* pProxyInfo : DNS_CONNECTION_PROXY_INFO* out -> (ptr void) *)
(* 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 dnsapi (t "DNSAPI.dll"))
(cffi:use-foreign-library dnsapi)

(cffi:defcfun ("DnsConnectionGetProxyInfo" dns-connection-get-proxy-info :convention :stdcall) :uint32
  (pwsz-connection-name (:string :encoding :utf-16le))   ; LPCWSTR
  (type :int32)   ; DNS_CONNECTION_PROXY_TYPE
  (p-proxy-info :pointer))   ; DNS_CONNECTION_PROXY_INFO* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DnsConnectionGetProxyInfo = Win32::API::More->new('DNSAPI',
    'DWORD DnsConnectionGetProxyInfo(LPCWSTR pwszConnectionName, int Type, LPVOID pProxyInfo)');
# my $ret = $DnsConnectionGetProxyInfo->Call($pwszConnectionName, $Type, $pProxyInfo);
# pwszConnectionName : LPCWSTR -> LPCWSTR
# Type : DNS_CONNECTION_PROXY_TYPE -> int
# pProxyInfo : DNS_CONNECTION_PROXY_INFO* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。