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DnsConnectionGetProxyInfoForHostUrl

関数
指定ホストURLに対する接続のプロキシ情報を取得する。
DLLDNSAPI.dll呼出規約winapi

シグネチャ

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

DWORD DnsConnectionGetProxyInfoForHostUrl(
    LPCWSTR pwszHostUrl,
    BYTE* pSelectionContext,   // optional
    DWORD dwSelectionContextLength,
    DWORD dwExplicitInterfaceIndex,
    DNS_CONNECTION_PROXY_INFO_EX* pProxyInfoEx
);

パラメーター

名前型方向説明
pwszHostUrlLPCWSTRinプロキシ情報を取得する対象ホストURLを表すUnicode文字列へのポインタ。
pSelectionContextBYTE*inoptionalプロキシ選択に用いる選択コンテキストのバイト配列へのポインタ。NULL可。
dwSelectionContextLengthDWORDin選択コンテキストの長さ(バイト)。
dwExplicitInterfaceIndexDWORDin使用するインターフェイスのインデックス。指定なしなら0。
pProxyInfoExDNS_CONNECTION_PROXY_INFO_EX*out取得した拡張プロキシ情報を受け取るDNS_CONNECTION_PROXY_INFO_EX構造体へのポインタ。

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD DnsConnectionGetProxyInfoForHostUrl(
    LPCWSTR pwszHostUrl,
    BYTE* pSelectionContext,   // optional
    DWORD dwSelectionContextLength,
    DWORD dwExplicitInterfaceIndex,
    DNS_CONNECTION_PROXY_INFO_EX* pProxyInfoEx
);
[DllImport("DNSAPI.dll", ExactSpelling = true)]
static extern uint DnsConnectionGetProxyInfoForHostUrl(
    [MarshalAs(UnmanagedType.LPWStr)] string pwszHostUrl,   // LPCWSTR
    IntPtr pSelectionContext,   // BYTE* optional
    uint dwSelectionContextLength,   // DWORD
    uint dwExplicitInterfaceIndex,   // DWORD
    IntPtr pProxyInfoEx   // DNS_CONNECTION_PROXY_INFO_EX* out
);
<DllImport("DNSAPI.dll", ExactSpelling:=True)>
Public Shared Function DnsConnectionGetProxyInfoForHostUrl(
    <MarshalAs(UnmanagedType.LPWStr)> pwszHostUrl As String,   ' LPCWSTR
    pSelectionContext As IntPtr,   ' BYTE* optional
    dwSelectionContextLength As UInteger,   ' DWORD
    dwExplicitInterfaceIndex As UInteger,   ' DWORD
    pProxyInfoEx As IntPtr   ' DNS_CONNECTION_PROXY_INFO_EX* out
) As UInteger
End Function
' pwszHostUrl : LPCWSTR
' pSelectionContext : BYTE* optional
' dwSelectionContextLength : DWORD
' dwExplicitInterfaceIndex : DWORD
' pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* out
Declare PtrSafe Function DnsConnectionGetProxyInfoForHostUrl Lib "dnsapi" ( _
    ByVal pwszHostUrl As LongPtr, _
    ByVal pSelectionContext As LongPtr, _
    ByVal dwSelectionContextLength As Long, _
    ByVal dwExplicitInterfaceIndex As Long, _
    ByVal pProxyInfoEx 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

DnsConnectionGetProxyInfoForHostUrl = ctypes.windll.dnsapi.DnsConnectionGetProxyInfoForHostUrl
DnsConnectionGetProxyInfoForHostUrl.restype = wintypes.DWORD
DnsConnectionGetProxyInfoForHostUrl.argtypes = [
    wintypes.LPCWSTR,  # pwszHostUrl : LPCWSTR
    ctypes.POINTER(ctypes.c_ubyte),  # pSelectionContext : BYTE* optional
    wintypes.DWORD,  # dwSelectionContextLength : DWORD
    wintypes.DWORD,  # dwExplicitInterfaceIndex : DWORD
    ctypes.c_void_p,  # pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DNSAPI.dll')
DnsConnectionGetProxyInfoForHostUrl = Fiddle::Function.new(
  lib['DnsConnectionGetProxyInfoForHostUrl'],
  [
    Fiddle::TYPE_VOIDP,  # pwszHostUrl : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pSelectionContext : BYTE* optional
    -Fiddle::TYPE_INT,  # dwSelectionContextLength : DWORD
    -Fiddle::TYPE_INT,  # dwExplicitInterfaceIndex : DWORD
    Fiddle::TYPE_VOIDP,  # pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* out
  ],
  -Fiddle::TYPE_INT)
#[link(name = "dnsapi")]
extern "system" {
    fn DnsConnectionGetProxyInfoForHostUrl(
        pwszHostUrl: *const u16,  // LPCWSTR
        pSelectionContext: *mut u8,  // BYTE* optional
        dwSelectionContextLength: u32,  // DWORD
        dwExplicitInterfaceIndex: u32,  // DWORD
        pProxyInfoEx: *mut DNS_CONNECTION_PROXY_INFO_EX  // DNS_CONNECTION_PROXY_INFO_EX* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("DNSAPI.dll")]
public static extern uint DnsConnectionGetProxyInfoForHostUrl([MarshalAs(UnmanagedType.LPWStr)] string pwszHostUrl, IntPtr pSelectionContext, uint dwSelectionContextLength, uint dwExplicitInterfaceIndex, IntPtr pProxyInfoEx);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DNSAPI_DnsConnectionGetProxyInfoForHostUrl' -Namespace Win32 -PassThru
# $api::DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
#uselib "DNSAPI.dll"
#func global DnsConnectionGetProxyInfoForHostUrl "DnsConnectionGetProxyInfoForHostUrl" sptr, sptr, sptr, sptr, sptr
; DnsConnectionGetProxyInfoForHostUrl pwszHostUrl, varptr(pSelectionContext), dwSelectionContextLength, dwExplicitInterfaceIndex, varptr(pProxyInfoEx)   ; 戻り値は stat
; pwszHostUrl : LPCWSTR -> "sptr"
; pSelectionContext : BYTE* optional -> "sptr"
; dwSelectionContextLength : DWORD -> "sptr"
; dwExplicitInterfaceIndex : DWORD -> "sptr"
; pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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。
出力引数: 
#uselib "DNSAPI.dll"
#cfunc global DnsConnectionGetProxyInfoForHostUrl "DnsConnectionGetProxyInfoForHostUrl" wstr, var, int, int, var
; res = DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
; pwszHostUrl : LPCWSTR -> "wstr"
; pSelectionContext : BYTE* optional -> "var"
; dwSelectionContextLength : DWORD -> "int"
; dwExplicitInterfaceIndex : DWORD -> "int"
; pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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。
出力引数: 
; DWORD DnsConnectionGetProxyInfoForHostUrl(LPCWSTR pwszHostUrl, BYTE* pSelectionContext, DWORD dwSelectionContextLength, DWORD dwExplicitInterfaceIndex, DNS_CONNECTION_PROXY_INFO_EX* pProxyInfoEx)
#uselib "DNSAPI.dll"
#cfunc global DnsConnectionGetProxyInfoForHostUrl "DnsConnectionGetProxyInfoForHostUrl" wstr, var, int, int, var
; res = DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
; pwszHostUrl : LPCWSTR -> "wstr"
; pSelectionContext : BYTE* optional -> "var"
; dwSelectionContextLength : DWORD -> "int"
; dwExplicitInterfaceIndex : DWORD -> "int"
; pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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 (
	dnsapi = windows.NewLazySystemDLL("DNSAPI.dll")
	procDnsConnectionGetProxyInfoForHostUrl = dnsapi.NewProc("DnsConnectionGetProxyInfoForHostUrl")
)

// pwszHostUrl (LPCWSTR), pSelectionContext (BYTE* optional), dwSelectionContextLength (DWORD), dwExplicitInterfaceIndex (DWORD), pProxyInfoEx (DNS_CONNECTION_PROXY_INFO_EX* out)
r1, _, err := procDnsConnectionGetProxyInfoForHostUrl.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszHostUrl))),
	uintptr(pSelectionContext),
	uintptr(dwSelectionContextLength),
	uintptr(dwExplicitInterfaceIndex),
	uintptr(pProxyInfoEx),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD
function DnsConnectionGetProxyInfoForHostUrl(
  pwszHostUrl: PWideChar;   // LPCWSTR
  pSelectionContext: Pointer;   // BYTE* optional
  dwSelectionContextLength: DWORD;   // DWORD
  dwExplicitInterfaceIndex: DWORD;   // DWORD
  pProxyInfoEx: Pointer   // DNS_CONNECTION_PROXY_INFO_EX* out
): DWORD; stdcall;
  external 'DNSAPI.dll' name 'DnsConnectionGetProxyInfoForHostUrl';
result := DllCall("DNSAPI\DnsConnectionGetProxyInfoForHostUrl"
    , "WStr", pwszHostUrl   ; LPCWSTR
    , "Ptr", pSelectionContext   ; BYTE* optional
    , "UInt", dwSelectionContextLength   ; DWORD
    , "UInt", dwExplicitInterfaceIndex   ; DWORD
    , "Ptr", pProxyInfoEx   ; DNS_CONNECTION_PROXY_INFO_EX* out
    , "UInt")   ; return: DWORD
●DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx) = DLL("DNSAPI.dll", "dword DnsConnectionGetProxyInfoForHostUrl(char*, void*, dword, dword, void*)")
# 呼び出し: DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
# pwszHostUrl : LPCWSTR -> "char*"
# pSelectionContext : BYTE* optional -> "void*"
# dwSelectionContextLength : DWORD -> "dword"
# dwExplicitInterfaceIndex : DWORD -> "dword"
# pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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 DnsConnectionGetProxyInfoForHostUrl(
    pwszHostUrl: [*c]const u16, // LPCWSTR
    pSelectionContext: [*c]u8, // BYTE* optional
    dwSelectionContextLength: u32, // DWORD
    dwExplicitInterfaceIndex: u32, // DWORD
    pProxyInfoEx: [*c]DNS_CONNECTION_PROXY_INFO_EX // DNS_CONNECTION_PROXY_INFO_EX* out
) callconv(std.os.windows.WINAPI) u32;
proc DnsConnectionGetProxyInfoForHostUrl(
    pwszHostUrl: WideCString,  # LPCWSTR
    pSelectionContext: ptr uint8,  # BYTE* optional
    dwSelectionContextLength: uint32,  # DWORD
    dwExplicitInterfaceIndex: uint32,  # DWORD
    pProxyInfoEx: ptr DNS_CONNECTION_PROXY_INFO_EX  # DNS_CONNECTION_PROXY_INFO_EX* out
): uint32 {.importc: "DnsConnectionGetProxyInfoForHostUrl", stdcall, dynlib: "DNSAPI.dll".}
pragma(lib, "dnsapi");
extern(Windows)
uint DnsConnectionGetProxyInfoForHostUrl(
    const(wchar)* pwszHostUrl,   // LPCWSTR
    ubyte* pSelectionContext,   // BYTE* optional
    uint dwSelectionContextLength,   // DWORD
    uint dwExplicitInterfaceIndex,   // DWORD
    DNS_CONNECTION_PROXY_INFO_EX* pProxyInfoEx   // DNS_CONNECTION_PROXY_INFO_EX* out
);
ccall((:DnsConnectionGetProxyInfoForHostUrl, "DNSAPI.dll"), stdcall, UInt32,
      (Cwstring, Ptr{UInt8}, UInt32, UInt32, Ptr{DNS_CONNECTION_PROXY_INFO_EX}),
      pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
# pwszHostUrl : LPCWSTR -> Cwstring
# pSelectionContext : BYTE* optional -> Ptr{UInt8}
# dwSelectionContextLength : DWORD -> UInt32
# dwExplicitInterfaceIndex : DWORD -> UInt32
# pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* out -> Ptr{DNS_CONNECTION_PROXY_INFO_EX}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
uint32_t DnsConnectionGetProxyInfoForHostUrl(
    const uint16_t* pwszHostUrl,
    uint8_t* pSelectionContext,
    uint32_t dwSelectionContextLength,
    uint32_t dwExplicitInterfaceIndex,
    void* pProxyInfoEx);
]]
local dnsapi = ffi.load("dnsapi")
-- dnsapi.DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
-- pwszHostUrl : LPCWSTR
-- pSelectionContext : BYTE* optional
-- dwSelectionContextLength : DWORD
-- dwExplicitInterfaceIndex : DWORD
-- pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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 DnsConnectionGetProxyInfoForHostUrl = lib.func('__stdcall', 'DnsConnectionGetProxyInfoForHostUrl', 'uint32_t', ['str16', 'uint8_t *', 'uint32_t', 'uint32_t', 'void *']);
// DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
// pwszHostUrl : LPCWSTR -> 'str16'
// pSelectionContext : BYTE* optional -> 'uint8_t *'
// dwSelectionContextLength : DWORD -> 'uint32_t'
// dwExplicitInterfaceIndex : DWORD -> 'uint32_t'
// pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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", {
  DnsConnectionGetProxyInfoForHostUrl: { parameters: ["buffer", "pointer", "u32", "u32", "pointer"], result: "u32" },
});
// lib.symbols.DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx)
// pwszHostUrl : LPCWSTR -> "buffer"
// pSelectionContext : BYTE* optional -> "pointer"
// dwSelectionContextLength : DWORD -> "u32"
// dwExplicitInterfaceIndex : DWORD -> "u32"
// pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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 DnsConnectionGetProxyInfoForHostUrl(
    const uint16_t* pwszHostUrl,
    uint8_t* pSelectionContext,
    uint32_t dwSelectionContextLength,
    uint32_t dwExplicitInterfaceIndex,
    void* pProxyInfoEx);
C, "DNSAPI.dll");
// $ffi->DnsConnectionGetProxyInfoForHostUrl(pwszHostUrl, pSelectionContext, dwSelectionContextLength, dwExplicitInterfaceIndex, pProxyInfoEx);
// pwszHostUrl : LPCWSTR
// pSelectionContext : BYTE* optional
// dwSelectionContextLength : DWORD
// dwExplicitInterfaceIndex : DWORD
// pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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 DnsConnectionGetProxyInfoForHostUrl(
        WString pwszHostUrl,   // LPCWSTR
        byte[] pSelectionContext,   // BYTE* optional
        int dwSelectionContextLength,   // DWORD
        int dwExplicitInterfaceIndex,   // DWORD
        Pointer pProxyInfoEx   // DNS_CONNECTION_PROXY_INFO_EX* out
    );
}
@[Link("dnsapi")]
lib LibDNSAPI
  fun DnsConnectionGetProxyInfoForHostUrl = DnsConnectionGetProxyInfoForHostUrl(
    pwszHostUrl : UInt16*,   # LPCWSTR
    pSelectionContext : UInt8*,   # BYTE* optional
    dwSelectionContextLength : UInt32,   # DWORD
    dwExplicitInterfaceIndex : UInt32,   # DWORD
    pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX*   # DNS_CONNECTION_PROXY_INFO_EX* 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 DnsConnectionGetProxyInfoForHostUrlNative = Uint32 Function(Pointer<Utf16>, Pointer<Uint8>, Uint32, Uint32, Pointer<Void>);
typedef DnsConnectionGetProxyInfoForHostUrlDart = int Function(Pointer<Utf16>, Pointer<Uint8>, int, int, Pointer<Void>);
final DnsConnectionGetProxyInfoForHostUrl = DynamicLibrary.open('DNSAPI.dll')
    .lookupFunction<DnsConnectionGetProxyInfoForHostUrlNative, DnsConnectionGetProxyInfoForHostUrlDart>('DnsConnectionGetProxyInfoForHostUrl');
// pwszHostUrl : LPCWSTR -> Pointer<Utf16>
// pSelectionContext : BYTE* optional -> Pointer<Uint8>
// dwSelectionContextLength : DWORD -> Uint32
// dwExplicitInterfaceIndex : DWORD -> Uint32
// pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function DnsConnectionGetProxyInfoForHostUrl(
  pwszHostUrl: PWideChar;   // LPCWSTR
  pSelectionContext: Pointer;   // BYTE* optional
  dwSelectionContextLength: DWORD;   // DWORD
  dwExplicitInterfaceIndex: DWORD;   // DWORD
  pProxyInfoEx: Pointer   // DNS_CONNECTION_PROXY_INFO_EX* out
): DWORD; stdcall;
  external 'DNSAPI.dll' name 'DnsConnectionGetProxyInfoForHostUrl';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "DnsConnectionGetProxyInfoForHostUrl"
  c_DnsConnectionGetProxyInfoForHostUrl :: CWString -> Ptr Word8 -> Word32 -> Word32 -> Ptr () -> IO Word32
-- pwszHostUrl : LPCWSTR -> CWString
-- pSelectionContext : BYTE* optional -> Ptr Word8
-- dwSelectionContextLength : DWORD -> Word32
-- dwExplicitInterfaceIndex : DWORD -> Word32
-- pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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 dnsconnectiongetproxyinfoforhosturl =
  foreign "DnsConnectionGetProxyInfoForHostUrl"
    ((ptr uint16_t) @-> (ptr uint8_t) @-> uint32_t @-> uint32_t @-> (ptr void) @-> returning uint32_t)
(* pwszHostUrl : LPCWSTR -> (ptr uint16_t) *)
(* pSelectionContext : BYTE* optional -> (ptr uint8_t) *)
(* dwSelectionContextLength : DWORD -> uint32_t *)
(* dwExplicitInterfaceIndex : DWORD -> uint32_t *)
(* pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* 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 ("DnsConnectionGetProxyInfoForHostUrl" dns-connection-get-proxy-info-for-host-url :convention :stdcall) :uint32
  (pwsz-host-url (:string :encoding :utf-16le))   ; LPCWSTR
  (p-selection-context :pointer)   ; BYTE* optional
  (dw-selection-context-length :uint32)   ; DWORD
  (dw-explicit-interface-index :uint32)   ; DWORD
  (p-proxy-info-ex :pointer))   ; DNS_CONNECTION_PROXY_INFO_EX* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $DnsConnectionGetProxyInfoForHostUrl = Win32::API::More->new('DNSAPI',
    'DWORD DnsConnectionGetProxyInfoForHostUrl(LPCWSTR pwszHostUrl, LPVOID pSelectionContext, DWORD dwSelectionContextLength, DWORD dwExplicitInterfaceIndex, LPVOID pProxyInfoEx)');
# my $ret = $DnsConnectionGetProxyInfoForHostUrl->Call($pwszHostUrl, $pSelectionContext, $dwSelectionContextLength, $dwExplicitInterfaceIndex, $pProxyInfoEx);
# pwszHostUrl : LPCWSTR -> LPCWSTR
# pSelectionContext : BYTE* optional -> LPVOID
# dwSelectionContextLength : DWORD -> DWORD
# dwExplicitInterfaceIndex : DWORD -> DWORD
# pProxyInfoEx : DNS_CONNECTION_PROXY_INFO_EX* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

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