InternetGetCookieA

// WININET.dll  (ANSI / -A)
#include <windows.h>

BOOL InternetGetCookieA(
    LPCSTR lpszUrl,
    LPCSTR lpszCookieName,   // optional
    LPSTR lpszCookieData,   // optional
    DWORD* lpdwSize
);

<DllImport("WININET.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InternetGetCookieA(
    <MarshalAs(UnmanagedType.LPStr)> lpszUrl As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> lpszCookieName As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> lpszCookieData As System.Text.StringBuilder,   ' LPSTR optional, out
    ByRef lpdwSize As UInteger   ' DWORD* in/out
) As Boolean
End Function

' lpszUrl : LPCSTR
' lpszCookieName : LPCSTR optional
' lpszCookieData : LPSTR optional, out
' lpdwSize : DWORD* in/out
Declare PtrSafe Function InternetGetCookieA Lib "wininet" ( _
    ByVal lpszUrl As String, _
    ByVal lpszCookieName As String, _
    ByVal lpszCookieData As String, _
    ByRef lpdwSize 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

InternetGetCookieA = ctypes.windll.wininet.InternetGetCookieA
InternetGetCookieA.restype = wintypes.BOOL
InternetGetCookieA.argtypes = [
    wintypes.LPCSTR,  # lpszUrl : LPCSTR
    wintypes.LPCSTR,  # lpszCookieName : LPCSTR optional
    wintypes.LPSTR,  # lpszCookieData : LPSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # lpdwSize : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetGetCookieA = Fiddle::Function.new(
  lib['InternetGetCookieA'],
  [
    Fiddle::TYPE_VOIDP,  # lpszUrl : LPCSTR
    Fiddle::TYPE_VOIDP,  # lpszCookieName : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # lpszCookieData : LPSTR optional, out
    Fiddle::TYPE_VOIDP,  # lpdwSize : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetGetCookieA(
        lpszUrl: *const u8,  // LPCSTR
        lpszCookieName: *const u8,  // LPCSTR optional
        lpszCookieData: *mut u8,  // LPSTR optional, out
        lpdwSize: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern bool InternetGetCookieA([MarshalAs(UnmanagedType.LPStr)] string lpszUrl, [MarshalAs(UnmanagedType.LPStr)] string lpszCookieName, [MarshalAs(UnmanagedType.LPStr)] System.Text.StringBuilder lpszCookieData, ref uint lpdwSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetGetCookieA' -Namespace Win32 -PassThru
# $api::InternetGetCookieA(lpszUrl, lpszCookieName, lpszCookieData, lpdwSize)

#uselib "WININET.dll"
#func global InternetGetCookieA "InternetGetCookieA" sptr, sptr, sptr, sptr
; InternetGetCookieA lpszUrl, lpszCookieName, varptr(lpszCookieData), varptr(lpdwSize)   ; 戻り値は stat
; lpszUrl : LPCSTR -> "sptr"
; lpszCookieName : LPCSTR optional -> "sptr"
; lpszCookieData : LPSTR optional, out -> "sptr"
; lpdwSize : 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 "WININET.dll"
#cfunc global InternetGetCookieA "InternetGetCookieA" str, str, var, var
; res = InternetGetCookieA(lpszUrl, lpszCookieName, lpszCookieData, lpdwSize)
; lpszUrl : LPCSTR -> "str"
; lpszCookieName : LPCSTR optional -> "str"
; lpszCookieData : LPSTR optional, out -> "var"
; lpdwSize : 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。

; BOOL InternetGetCookieA(LPCSTR lpszUrl, LPCSTR lpszCookieName, LPSTR lpszCookieData, DWORD* lpdwSize)
#uselib "WININET.dll"
#cfunc global InternetGetCookieA "InternetGetCookieA" str, str, var, var
; res = InternetGetCookieA(lpszUrl, lpszCookieName, lpszCookieData, lpdwSize)
; lpszUrl : LPCSTR -> "str"
; lpszCookieName : LPCSTR optional -> "str"
; lpszCookieData : LPSTR optional, out -> "var"
; lpdwSize : 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 (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetGetCookieA = wininet.NewProc("InternetGetCookieA")
)

// lpszUrl (LPCSTR), lpszCookieName (LPCSTR optional), lpszCookieData (LPSTR optional, out), lpdwSize (DWORD* in/out)
r1, _, err := procInternetGetCookieA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszUrl))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszCookieName))),
	uintptr(lpszCookieData),
	uintptr(lpdwSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function InternetGetCookieA(
  lpszUrl: PAnsiChar;   // LPCSTR
  lpszCookieName: PAnsiChar;   // LPCSTR optional
  lpszCookieData: PAnsiChar;   // LPSTR optional, out
  lpdwSize: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'WININET.dll' name 'InternetGetCookieA';

result := DllCall("WININET\InternetGetCookieA"
    , "AStr", lpszUrl   ; LPCSTR
    , "AStr", lpszCookieName   ; LPCSTR optional
    , "Ptr", lpszCookieData   ; LPSTR optional, out
    , "Ptr", lpdwSize   ; DWORD* in/out
    , "Int")   ; return: BOOL

●InternetGetCookieA(lpszUrl, lpszCookieName, lpszCookieData, lpdwSize) = DLL("WININET.dll", "bool InternetGetCookieA(char*, char*, char*, void*)")
# 呼び出し: InternetGetCookieA(lpszUrl, lpszCookieName, lpszCookieData, lpdwSize)
# lpszUrl : LPCSTR -> "char*"
# lpszCookieName : LPCSTR optional -> "char*"
# lpszCookieData : LPSTR optional, out -> "char*"
# lpdwSize : 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)。