InternetGetCookieEx2

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

DWORD InternetGetCookieEx2(
    LPCWSTR pcwszUrl,
    LPCWSTR pcwszCookieName,   // optional
    DWORD dwFlags,
    INTERNET_COOKIE2** ppCookies,
    DWORD* pdwCookieCount
);

<DllImport("WININET.dll", ExactSpelling:=True)>
Public Shared Function InternetGetCookieEx2(
    <MarshalAs(UnmanagedType.LPWStr)> pcwszUrl As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> pcwszCookieName As String,   ' LPCWSTR optional
    dwFlags As UInteger,   ' DWORD
    ppCookies As IntPtr,   ' INTERNET_COOKIE2** out
    <Out> ByRef pdwCookieCount As UInteger   ' DWORD* out
) As UInteger
End Function

' pcwszUrl : LPCWSTR
' pcwszCookieName : LPCWSTR optional
' dwFlags : DWORD
' ppCookies : INTERNET_COOKIE2** out
' pdwCookieCount : DWORD* out
Declare PtrSafe Function InternetGetCookieEx2 Lib "wininet" ( _
    ByVal pcwszUrl As LongPtr, _
    ByVal pcwszCookieName As LongPtr, _
    ByVal dwFlags As Long, _
    ByVal ppCookies As LongPtr, _
    ByRef pdwCookieCount 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

InternetGetCookieEx2 = ctypes.windll.wininet.InternetGetCookieEx2
InternetGetCookieEx2.restype = wintypes.DWORD
InternetGetCookieEx2.argtypes = [
    wintypes.LPCWSTR,  # pcwszUrl : LPCWSTR
    wintypes.LPCWSTR,  # pcwszCookieName : LPCWSTR optional
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_void_p,  # ppCookies : INTERNET_COOKIE2** out
    ctypes.POINTER(wintypes.DWORD),  # pdwCookieCount : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetGetCookieEx2 = Fiddle::Function.new(
  lib['InternetGetCookieEx2'],
  [
    Fiddle::TYPE_VOIDP,  # pcwszUrl : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pcwszCookieName : LPCWSTR optional
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_VOIDP,  # ppCookies : INTERNET_COOKIE2** out
    Fiddle::TYPE_VOIDP,  # pdwCookieCount : DWORD* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetGetCookieEx2(
        pcwszUrl: *const u16,  // LPCWSTR
        pcwszCookieName: *const u16,  // LPCWSTR optional
        dwFlags: u32,  // DWORD
        ppCookies: *mut *mut INTERNET_COOKIE2,  // INTERNET_COOKIE2** out
        pdwCookieCount: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WININET.dll")]
public static extern uint InternetGetCookieEx2([MarshalAs(UnmanagedType.LPWStr)] string pcwszUrl, [MarshalAs(UnmanagedType.LPWStr)] string pcwszCookieName, uint dwFlags, IntPtr ppCookies, out uint pdwCookieCount);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetGetCookieEx2' -Namespace Win32 -PassThru
# $api::InternetGetCookieEx2(pcwszUrl, pcwszCookieName, dwFlags, ppCookies, pdwCookieCount)

#uselib "WININET.dll"
#func global InternetGetCookieEx2 "InternetGetCookieEx2" sptr, sptr, sptr, sptr, sptr
; InternetGetCookieEx2 pcwszUrl, pcwszCookieName, dwFlags, varptr(ppCookies), varptr(pdwCookieCount)   ; 戻り値は stat
; pcwszUrl : LPCWSTR -> "sptr"
; pcwszCookieName : LPCWSTR optional -> "sptr"
; dwFlags : DWORD -> "sptr"
; ppCookies : INTERNET_COOKIE2** out -> "sptr"
; pdwCookieCount : DWORD* 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 "WININET.dll"
#cfunc global InternetGetCookieEx2 "InternetGetCookieEx2" wstr, wstr, int, var, var
; res = InternetGetCookieEx2(pcwszUrl, pcwszCookieName, dwFlags, ppCookies, pdwCookieCount)
; pcwszUrl : LPCWSTR -> "wstr"
; pcwszCookieName : LPCWSTR optional -> "wstr"
; dwFlags : DWORD -> "int"
; ppCookies : INTERNET_COOKIE2** out -> "var"
; pdwCookieCount : DWORD* 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 InternetGetCookieEx2(LPCWSTR pcwszUrl, LPCWSTR pcwszCookieName, DWORD dwFlags, INTERNET_COOKIE2** ppCookies, DWORD* pdwCookieCount)
#uselib "WININET.dll"
#cfunc global InternetGetCookieEx2 "InternetGetCookieEx2" wstr, wstr, int, var, var
; res = InternetGetCookieEx2(pcwszUrl, pcwszCookieName, dwFlags, ppCookies, pdwCookieCount)
; pcwszUrl : LPCWSTR -> "wstr"
; pcwszCookieName : LPCWSTR optional -> "wstr"
; dwFlags : DWORD -> "int"
; ppCookies : INTERNET_COOKIE2** out -> "var"
; pdwCookieCount : DWORD* 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 (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetGetCookieEx2 = wininet.NewProc("InternetGetCookieEx2")
)

// pcwszUrl (LPCWSTR), pcwszCookieName (LPCWSTR optional), dwFlags (DWORD), ppCookies (INTERNET_COOKIE2** out), pdwCookieCount (DWORD* out)
r1, _, err := procInternetGetCookieEx2.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pcwszUrl))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pcwszCookieName))),
	uintptr(dwFlags),
	uintptr(ppCookies),
	uintptr(pdwCookieCount),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function InternetGetCookieEx2(
  pcwszUrl: PWideChar;   // LPCWSTR
  pcwszCookieName: PWideChar;   // LPCWSTR optional
  dwFlags: DWORD;   // DWORD
  ppCookies: Pointer;   // INTERNET_COOKIE2** out
  pdwCookieCount: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'WININET.dll' name 'InternetGetCookieEx2';

result := DllCall("WININET\InternetGetCookieEx2"
    , "WStr", pcwszUrl   ; LPCWSTR
    , "WStr", pcwszCookieName   ; LPCWSTR optional
    , "UInt", dwFlags   ; DWORD
    , "Ptr", ppCookies   ; INTERNET_COOKIE2** out
    , "Ptr", pdwCookieCount   ; DWORD* out
    , "UInt")   ; return: DWORD

●InternetGetCookieEx2(pcwszUrl, pcwszCookieName, dwFlags, ppCookies, pdwCookieCount) = DLL("WININET.dll", "dword InternetGetCookieEx2(char*, char*, dword, void*, void*)")
# 呼び出し: InternetGetCookieEx2(pcwszUrl, pcwszCookieName, dwFlags, ppCookies, pdwCookieCount)
# pcwszUrl : LPCWSTR -> "char*"
# pcwszCookieName : LPCWSTR optional -> "char*"
# dwFlags : DWORD -> "dword"
# ppCookies : INTERNET_COOKIE2** out -> "void*"
# pdwCookieCount : DWORD* 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)。