InternetSetCookieExA

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

DWORD InternetSetCookieExA(
    LPCSTR lpszUrl,
    LPCSTR lpszCookieName,   // optional
    LPCSTR lpszCookieData,
    DWORD dwFlags,
    UINT_PTR dwReserved   // optional
);

<DllImport("WININET.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InternetSetCookieExA(
    <MarshalAs(UnmanagedType.LPStr)> lpszUrl As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> lpszCookieName As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> lpszCookieData As String,   ' LPCSTR
    dwFlags As UInteger,   ' DWORD
    dwReserved As UIntPtr   ' UINT_PTR optional
) As UInteger
End Function

' lpszUrl : LPCSTR
' lpszCookieName : LPCSTR optional
' lpszCookieData : LPCSTR
' dwFlags : DWORD
' dwReserved : UINT_PTR optional
Declare PtrSafe Function InternetSetCookieExA Lib "wininet" ( _
    ByVal lpszUrl As String, _
    ByVal lpszCookieName As String, _
    ByVal lpszCookieData As String, _
    ByVal dwFlags As Long, _
    ByVal dwReserved 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

InternetSetCookieExA = ctypes.windll.wininet.InternetSetCookieExA
InternetSetCookieExA.restype = wintypes.DWORD
InternetSetCookieExA.argtypes = [
    wintypes.LPCSTR,  # lpszUrl : LPCSTR
    wintypes.LPCSTR,  # lpszCookieName : LPCSTR optional
    wintypes.LPCSTR,  # lpszCookieData : LPCSTR
    wintypes.DWORD,  # dwFlags : DWORD
    ctypes.c_size_t,  # dwReserved : UINT_PTR optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetSetCookieExA = Fiddle::Function.new(
  lib['InternetSetCookieExA'],
  [
    Fiddle::TYPE_VOIDP,  # lpszUrl : LPCSTR
    Fiddle::TYPE_VOIDP,  # lpszCookieName : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # lpszCookieData : LPCSTR
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    Fiddle::TYPE_UINTPTR_T,  # dwReserved : UINT_PTR optional
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetSetCookieExA(
        lpszUrl: *const u8,  // LPCSTR
        lpszCookieName: *const u8,  // LPCSTR optional
        lpszCookieData: *const u8,  // LPCSTR
        dwFlags: u32,  // DWORD
        dwReserved: usize  // UINT_PTR optional
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WININET.dll", CharSet = CharSet.Ansi, SetLastError = true)]
public static extern uint InternetSetCookieExA([MarshalAs(UnmanagedType.LPStr)] string lpszUrl, [MarshalAs(UnmanagedType.LPStr)] string lpszCookieName, [MarshalAs(UnmanagedType.LPStr)] string lpszCookieData, uint dwFlags, UIntPtr dwReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetSetCookieExA' -Namespace Win32 -PassThru
# $api::InternetSetCookieExA(lpszUrl, lpszCookieName, lpszCookieData, dwFlags, dwReserved)

#uselib "WININET.dll"
#func global InternetSetCookieExA "InternetSetCookieExA" sptr, sptr, sptr, sptr, sptr
; InternetSetCookieExA lpszUrl, lpszCookieName, lpszCookieData, dwFlags, dwReserved   ; 戻り値は stat
; lpszUrl : LPCSTR -> "sptr"
; lpszCookieName : LPCSTR optional -> "sptr"
; lpszCookieData : LPCSTR -> "sptr"
; dwFlags : DWORD -> "sptr"
; dwReserved : UINT_PTR optional -> "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 InternetSetCookieExA "InternetSetCookieExA" str, str, str, int, sptr
; res = InternetSetCookieExA(lpszUrl, lpszCookieName, lpszCookieData, dwFlags, dwReserved)
; lpszUrl : LPCSTR -> "str"
; lpszCookieName : LPCSTR optional -> "str"
; lpszCookieData : LPCSTR -> "str"
; dwFlags : DWORD -> "int"
; dwReserved : UINT_PTR optional -> "sptr"

; DWORD InternetSetCookieExA(LPCSTR lpszUrl, LPCSTR lpszCookieName, LPCSTR lpszCookieData, DWORD dwFlags, UINT_PTR dwReserved)
#uselib "WININET.dll"
#cfunc global InternetSetCookieExA "InternetSetCookieExA" str, str, str, int, intptr
; res = InternetSetCookieExA(lpszUrl, lpszCookieName, lpszCookieData, dwFlags, dwReserved)
; lpszUrl : LPCSTR -> "str"
; lpszCookieName : LPCSTR optional -> "str"
; lpszCookieData : LPCSTR -> "str"
; dwFlags : DWORD -> "int"
; dwReserved : UINT_PTR optional -> "intptr"

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetSetCookieExA = wininet.NewProc("InternetSetCookieExA")
)

// lpszUrl (LPCSTR), lpszCookieName (LPCSTR optional), lpszCookieData (LPCSTR), dwFlags (DWORD), dwReserved (UINT_PTR optional)
r1, _, err := procInternetSetCookieExA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszUrl))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszCookieName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpszCookieData))),
	uintptr(dwFlags),
	uintptr(dwReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function InternetSetCookieExA(
  lpszUrl: PAnsiChar;   // LPCSTR
  lpszCookieName: PAnsiChar;   // LPCSTR optional
  lpszCookieData: PAnsiChar;   // LPCSTR
  dwFlags: DWORD;   // DWORD
  dwReserved: NativeUInt   // UINT_PTR optional
): DWORD; stdcall;
  external 'WININET.dll' name 'InternetSetCookieExA';

result := DllCall("WININET\InternetSetCookieExA"
    , "AStr", lpszUrl   ; LPCSTR
    , "AStr", lpszCookieName   ; LPCSTR optional
    , "AStr", lpszCookieData   ; LPCSTR
    , "UInt", dwFlags   ; DWORD
    , "UPtr", dwReserved   ; UINT_PTR optional
    , "UInt")   ; return: DWORD

●InternetSetCookieExA(lpszUrl, lpszCookieName, lpszCookieData, dwFlags, dwReserved) = DLL("WININET.dll", "dword InternetSetCookieExA(char*, char*, char*, dword, int)")
# 呼び出し: InternetSetCookieExA(lpszUrl, lpszCookieName, lpszCookieData, dwFlags, dwReserved)
# lpszUrl : LPCSTR -> "char*"
# lpszCookieName : LPCSTR optional -> "char*"
# lpszCookieData : LPCSTR -> "char*"
# dwFlags : DWORD -> "dword"
# dwReserved : UINT_PTR optional -> "int"
# 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)。