InternetSetCookieA

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

BOOL InternetSetCookieA(
    LPCSTR lpszUrl,
    LPCSTR lpszCookieName,   // optional
    LPCSTR lpszCookieData
);

<DllImport("WININET.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InternetSetCookieA(
    <MarshalAs(UnmanagedType.LPStr)> lpszUrl As String,   ' LPCSTR
    <MarshalAs(UnmanagedType.LPStr)> lpszCookieName As String,   ' LPCSTR optional
    <MarshalAs(UnmanagedType.LPStr)> lpszCookieData As String   ' LPCSTR
) As Boolean
End Function

' lpszUrl : LPCSTR
' lpszCookieName : LPCSTR optional
' lpszCookieData : LPCSTR
Declare PtrSafe Function InternetSetCookieA Lib "wininet" ( _
    ByVal lpszUrl As String, _
    ByVal lpszCookieName As String, _
    ByVal lpszCookieData As String) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

InternetSetCookieA = ctypes.windll.wininet.InternetSetCookieA
InternetSetCookieA.restype = wintypes.BOOL
InternetSetCookieA.argtypes = [
    wintypes.LPCSTR,  # lpszUrl : LPCSTR
    wintypes.LPCSTR,  # lpszCookieName : LPCSTR optional
    wintypes.LPCSTR,  # lpszCookieData : LPCSTR
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetSetCookieA = Fiddle::Function.new(
  lib['InternetSetCookieA'],
  [
    Fiddle::TYPE_VOIDP,  # lpszUrl : LPCSTR
    Fiddle::TYPE_VOIDP,  # lpszCookieName : LPCSTR optional
    Fiddle::TYPE_VOIDP,  # lpszCookieData : LPCSTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetSetCookieA(
        lpszUrl: *const u8,  // LPCSTR
        lpszCookieName: *const u8,  // LPCSTR optional
        lpszCookieData: *const u8  // LPCSTR
    ) -> 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 InternetSetCookieA([MarshalAs(UnmanagedType.LPStr)] string lpszUrl, [MarshalAs(UnmanagedType.LPStr)] string lpszCookieName, [MarshalAs(UnmanagedType.LPStr)] string lpszCookieData);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetSetCookieA' -Namespace Win32 -PassThru
# $api::InternetSetCookieA(lpszUrl, lpszCookieName, lpszCookieData)

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

; BOOL InternetSetCookieA(LPCSTR lpszUrl, LPCSTR lpszCookieName, LPCSTR lpszCookieData)
#uselib "WININET.dll"
#cfunc global InternetSetCookieA "InternetSetCookieA" str, str, str
; res = InternetSetCookieA(lpszUrl, lpszCookieName, lpszCookieData)
; lpszUrl : LPCSTR -> "str"
; lpszCookieName : LPCSTR optional -> "str"
; lpszCookieData : LPCSTR -> "str"

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetSetCookieA = wininet.NewProc("InternetSetCookieA")
)

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

function InternetSetCookieA(
  lpszUrl: PAnsiChar;   // LPCSTR
  lpszCookieName: PAnsiChar;   // LPCSTR optional
  lpszCookieData: PAnsiChar   // LPCSTR
): BOOL; stdcall;
  external 'WININET.dll' name 'InternetSetCookieA';

result := DllCall("WININET\InternetSetCookieA"
    , "AStr", lpszUrl   ; LPCSTR
    , "AStr", lpszCookieName   ; LPCSTR optional
    , "AStr", lpszCookieData   ; LPCSTR
    , "Int")   ; return: BOOL

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