InternetCheckConnectionA

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

BOOL InternetCheckConnectionA(
    LPCSTR lpszUrl,
    DWORD dwFlags,
    DWORD dwReserved
);

<DllImport("WININET.dll", CharSet:=CharSet.Ansi, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InternetCheckConnectionA(
    <MarshalAs(UnmanagedType.LPStr)> lpszUrl As String,   ' LPCSTR
    dwFlags As UInteger,   ' DWORD
    dwReserved As UInteger   ' DWORD
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' lpszUrl : LPCSTR
' dwFlags : DWORD
' dwReserved : DWORD
Declare PtrSafe Function InternetCheckConnectionA Lib "wininet" ( _
    ByVal lpszUrl As String, _
    ByVal dwFlags As Long, _
    ByVal dwReserved 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

InternetCheckConnectionA = ctypes.windll.wininet.InternetCheckConnectionA
InternetCheckConnectionA.restype = wintypes.BOOL
InternetCheckConnectionA.argtypes = [
    wintypes.LPCSTR,  # lpszUrl : LPCSTR
    wintypes.DWORD,  # dwFlags : DWORD
    wintypes.DWORD,  # dwReserved : DWORD
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetCheckConnectionA = Fiddle::Function.new(
  lib['InternetCheckConnectionA'],
  [
    Fiddle::TYPE_VOIDP,  # lpszUrl : LPCSTR
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
    -Fiddle::TYPE_INT,  # dwReserved : DWORD
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetCheckConnectionA(
        lpszUrl: *const u8,  // LPCSTR
        dwFlags: u32,  // DWORD
        dwReserved: u32  // DWORD
    ) -> 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 InternetCheckConnectionA([MarshalAs(UnmanagedType.LPStr)] string lpszUrl, uint dwFlags, uint dwReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetCheckConnectionA' -Namespace Win32 -PassThru
# $api::InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved)

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

; BOOL InternetCheckConnectionA(LPCSTR lpszUrl, DWORD dwFlags, DWORD dwReserved)
#uselib "WININET.dll"
#cfunc global InternetCheckConnectionA "InternetCheckConnectionA" str, int, int
; res = InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved)
; lpszUrl : LPCSTR -> "str"
; dwFlags : DWORD -> "int"
; dwReserved : DWORD -> "int"

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetCheckConnectionA = wininet.NewProc("InternetCheckConnectionA")
)

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

function InternetCheckConnectionA(
  lpszUrl: PAnsiChar;   // LPCSTR
  dwFlags: DWORD;   // DWORD
  dwReserved: DWORD   // DWORD
): BOOL; stdcall;
  external 'WININET.dll' name 'InternetCheckConnectionA';

result := DllCall("WININET\InternetCheckConnectionA"
    , "AStr", lpszUrl   ; LPCSTR
    , "UInt", dwFlags   ; DWORD
    , "UInt", dwReserved   ; DWORD
    , "Int")   ; return: BOOL

●InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved) = DLL("WININET.dll", "bool InternetCheckConnectionA(char*, dword, dword)")
# 呼び出し: InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved)
# lpszUrl : LPCSTR -> "char*"
# dwFlags : DWORD -> "dword"
# dwReserved : DWORD -> "dword"
# 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 "wininet" fn InternetCheckConnectionA(
    lpszUrl: [*c]const u8, // LPCSTR
    dwFlags: u32, // DWORD
    dwReserved: u32 // DWORD
) callconv(std.os.windows.WINAPI) i32;

proc InternetCheckConnectionA(
    lpszUrl: cstring,  # LPCSTR
    dwFlags: uint32,  # DWORD
    dwReserved: uint32  # DWORD
): int32 {.importc: "InternetCheckConnectionA", stdcall, dynlib: "WININET.dll".}

pragma(lib, "wininet");
extern(Windows)
int InternetCheckConnectionA(
    const(char)* lpszUrl,   // LPCSTR
    uint dwFlags,   // DWORD
    uint dwReserved   // DWORD
);

ccall((:InternetCheckConnectionA, "WININET.dll"), stdcall, Int32,
      (Cstring, UInt32, UInt32),
      lpszUrl, dwFlags, dwReserved)
# lpszUrl : LPCSTR -> Cstring
# dwFlags : DWORD -> UInt32
# dwReserved : DWORD -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t InternetCheckConnectionA(
    const char* lpszUrl,
    uint32_t dwFlags,
    uint32_t dwReserved);
]]
local wininet = ffi.load("wininet")
-- wininet.InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved)
-- lpszUrl : LPCSTR
-- dwFlags : DWORD
-- dwReserved : DWORD
-- 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('WININET.dll');
const InternetCheckConnectionA = lib.func('__stdcall', 'InternetCheckConnectionA', 'int32_t', ['str', 'uint32_t', 'uint32_t']);
// InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved)
// lpszUrl : LPCSTR -> 'str'
// dwFlags : DWORD -> 'uint32_t'
// dwReserved : DWORD -> 'uint32_t'
// 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("WININET.dll", {
  InternetCheckConnectionA: { parameters: ["buffer", "u32", "u32"], result: "i32" },
});
// lib.symbols.InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved)
// lpszUrl : LPCSTR -> "buffer"
// dwFlags : DWORD -> "u32"
// dwReserved : DWORD -> "u32"
// 文字列は "buffer"。ANSI(-A) は new TextEncoder() で UTF-8/ANSI バイト列(末尾に \x00)を渡す。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t InternetCheckConnectionA(
    const char* lpszUrl,
    uint32_t dwFlags,
    uint32_t dwReserved);
C, "WININET.dll");
// $ffi->InternetCheckConnectionA(lpszUrl, dwFlags, dwReserved);
// lpszUrl : LPCSTR
// dwFlags : DWORD
// dwReserved : DWORD
// 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 Wininet extends StdCallLibrary {
    Wininet INSTANCE = Native.load("wininet", Wininet.class, W32APIOptions.ASCII_OPTIONS);
    boolean InternetCheckConnectionA(
        String lpszUrl,   // LPCSTR
        int dwFlags,   // DWORD
        int dwReserved   // DWORD
    );
}

@[Link("wininet")]
lib LibWININET
  fun InternetCheckConnectionA = InternetCheckConnectionA(
    lpszUrl : UInt8*,   # LPCSTR
    dwFlags : UInt32,   # DWORD
    dwReserved : UInt32   # DWORD
  ) : Int32
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 InternetCheckConnectionANative = Int32 Function(Pointer<Utf8>, Uint32, Uint32);
typedef InternetCheckConnectionADart = int Function(Pointer<Utf8>, int, int);
final InternetCheckConnectionA = DynamicLibrary.open('WININET.dll')
    .lookupFunction<InternetCheckConnectionANative, InternetCheckConnectionADart>('InternetCheckConnectionA');
// lpszUrl : LPCSTR -> Pointer<Utf8>
// dwFlags : DWORD -> Uint32
// dwReserved : DWORD -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function InternetCheckConnectionA(
  lpszUrl: PAnsiChar;   // LPCSTR
  dwFlags: DWORD;   // DWORD
  dwReserved: DWORD   // DWORD
): BOOL; stdcall;
  external 'WININET.dll' name 'InternetCheckConnectionA';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "InternetCheckConnectionA"
  c_InternetCheckConnectionA :: CString -> Word32 -> Word32 -> IO CInt
-- lpszUrl : LPCSTR -> CString
-- dwFlags : DWORD -> Word32
-- dwReserved : DWORD -> Word32
-- 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 internetcheckconnectiona =
  foreign "InternetCheckConnectionA"
    (string @-> uint32_t @-> uint32_t @-> returning int32_t)
(* lpszUrl : LPCSTR -> string *)
(* dwFlags : DWORD -> uint32_t *)
(* dwReserved : DWORD -> uint32_t *)
(* 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 wininet (t "WININET.dll"))
(cffi:use-foreign-library wininet)

(cffi:defcfun ("InternetCheckConnectionA" internet-check-connection-a :convention :stdcall) :int32
  (lpsz-url :string)   ; LPCSTR
  (dw-flags :uint32)   ; DWORD
  (dw-reserved :uint32))   ; DWORD
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $InternetCheckConnectionA = Win32::API::More->new('WININET',
    'BOOL InternetCheckConnectionA(LPCSTR lpszUrl, DWORD dwFlags, DWORD dwReserved)');
# my $ret = $InternetCheckConnectionA->Call($lpszUrl, $dwFlags, $dwReserved);
# lpszUrl : LPCSTR -> LPCSTR
# dwFlags : DWORD -> DWORD
# dwReserved : DWORD -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。