InternetGetConnectedState

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

BOOL InternetGetConnectedState(
    INTERNET_CONNECTION* lpdwFlags,
    DWORD dwReserved   // optional
);

<DllImport("WININET.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InternetGetConnectedState(
    <Out> ByRef lpdwFlags As UInteger,   ' INTERNET_CONNECTION* out
    dwReserved As UInteger   ' DWORD optional
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function

' lpdwFlags : INTERNET_CONNECTION* out
' dwReserved : DWORD optional
Declare PtrSafe Function InternetGetConnectedState Lib "wininet" ( _
    ByRef lpdwFlags 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

InternetGetConnectedState = ctypes.windll.wininet.InternetGetConnectedState
InternetGetConnectedState.restype = wintypes.BOOL
InternetGetConnectedState.argtypes = [
    ctypes.c_void_p,  # lpdwFlags : INTERNET_CONNECTION* out
    wintypes.DWORD,  # dwReserved : DWORD optional
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WININET.dll')
InternetGetConnectedState = Fiddle::Function.new(
  lib['InternetGetConnectedState'],
  [
    Fiddle::TYPE_VOIDP,  # lpdwFlags : INTERNET_CONNECTION* out
    -Fiddle::TYPE_INT,  # dwReserved : DWORD optional
  ],
  Fiddle::TYPE_INT)

#[link(name = "wininet")]
extern "system" {
    fn InternetGetConnectedState(
        lpdwFlags: *mut u32,  // INTERNET_CONNECTION* out
        dwReserved: u32  // DWORD optional
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WININET.dll", SetLastError = true)]
public static extern bool InternetGetConnectedState(out uint lpdwFlags, uint dwReserved);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WININET_InternetGetConnectedState' -Namespace Win32 -PassThru
# $api::InternetGetConnectedState(lpdwFlags, dwReserved)

#uselib "WININET.dll"
#func global InternetGetConnectedState "InternetGetConnectedState" sptr, sptr
; InternetGetConnectedState varptr(lpdwFlags), dwReserved   ; 戻り値は stat
; lpdwFlags : INTERNET_CONNECTION* out -> "sptr"
; dwReserved : DWORD 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。

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

var (
	wininet = windows.NewLazySystemDLL("WININET.dll")
	procInternetGetConnectedState = wininet.NewProc("InternetGetConnectedState")
)

// lpdwFlags (INTERNET_CONNECTION* out), dwReserved (DWORD optional)
r1, _, err := procInternetGetConnectedState.Call(
	uintptr(lpdwFlags),
	uintptr(dwReserved),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function InternetGetConnectedState(
  lpdwFlags: Pointer;   // INTERNET_CONNECTION* out
  dwReserved: DWORD   // DWORD optional
): BOOL; stdcall;
  external 'WININET.dll' name 'InternetGetConnectedState';

result := DllCall("WININET\InternetGetConnectedState"
    , "Ptr", lpdwFlags   ; INTERNET_CONNECTION* out
    , "UInt", dwReserved   ; DWORD optional
    , "Int")   ; return: BOOL

●InternetGetConnectedState(lpdwFlags, dwReserved) = DLL("WININET.dll", "bool InternetGetConnectedState(void*, dword)")
# 呼び出し: InternetGetConnectedState(lpdwFlags, dwReserved)
# lpdwFlags : INTERNET_CONNECTION* out -> "void*"
# dwReserved : DWORD optional -> "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 InternetGetConnectedState(
    lpdwFlags: [*c]u32, // INTERNET_CONNECTION* out
    dwReserved: u32 // DWORD optional
) callconv(std.os.windows.WINAPI) i32;

proc InternetGetConnectedState(
    lpdwFlags: ptr uint32,  # INTERNET_CONNECTION* out
    dwReserved: uint32  # DWORD optional
): int32 {.importc: "InternetGetConnectedState", stdcall, dynlib: "WININET.dll".}

pragma(lib, "wininet");
extern(Windows)
int InternetGetConnectedState(
    uint* lpdwFlags,   // INTERNET_CONNECTION* out
    uint dwReserved   // DWORD optional
);

ccall((:InternetGetConnectedState, "WININET.dll"), stdcall, Int32,
      (Ptr{UInt32}, UInt32),
      lpdwFlags, dwReserved)
# lpdwFlags : INTERNET_CONNECTION* out -> Ptr{UInt32}
# dwReserved : DWORD optional -> UInt32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t InternetGetConnectedState(
    uint32_t* lpdwFlags,
    uint32_t dwReserved);
]]
local wininet = ffi.load("wininet")
-- wininet.InternetGetConnectedState(lpdwFlags, dwReserved)
-- lpdwFlags : INTERNET_CONNECTION* out
-- dwReserved : DWORD optional
-- 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 InternetGetConnectedState = lib.func('__stdcall', 'InternetGetConnectedState', 'int32_t', ['uint32_t *', 'uint32_t']);
// InternetGetConnectedState(lpdwFlags, dwReserved)
// lpdwFlags : INTERNET_CONNECTION* out -> 'uint32_t *'
// dwReserved : DWORD optional -> '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", {
  InternetGetConnectedState: { parameters: ["pointer", "u32"], result: "i32" },
});
// lib.symbols.InternetGetConnectedState(lpdwFlags, dwReserved)
// lpdwFlags : INTERNET_CONNECTION* out -> "pointer"
// dwReserved : DWORD optional -> "u32"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。

<?php
$ffi = FFI::cdef(<<<C
int32_t InternetGetConnectedState(
    uint32_t* lpdwFlags,
    uint32_t dwReserved);
C, "WININET.dll");
// $ffi->InternetGetConnectedState(lpdwFlags, dwReserved);
// lpdwFlags : INTERNET_CONNECTION* out
// dwReserved : DWORD optional
// 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);
    boolean InternetGetConnectedState(
        IntByReference lpdwFlags,   // INTERNET_CONNECTION* out
        int dwReserved   // DWORD optional
    );
}

@[Link("wininet")]
lib LibWININET
  fun InternetGetConnectedState = InternetGetConnectedState(
    lpdwFlags : UInt32*,   # INTERNET_CONNECTION* out
    dwReserved : UInt32   # DWORD optional
  ) : 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 InternetGetConnectedStateNative = Int32 Function(Pointer<Uint32>, Uint32);
typedef InternetGetConnectedStateDart = int Function(Pointer<Uint32>, int);
final InternetGetConnectedState = DynamicLibrary.open('WININET.dll')
    .lookupFunction<InternetGetConnectedStateNative, InternetGetConnectedStateDart>('InternetGetConnectedState');
// lpdwFlags : INTERNET_CONNECTION* out -> Pointer<Uint32>
// dwReserved : DWORD optional -> Uint32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function InternetGetConnectedState(
  lpdwFlags: Pointer;   // INTERNET_CONNECTION* out
  dwReserved: DWORD   // DWORD optional
): BOOL; stdcall;
  external 'WININET.dll' name 'InternetGetConnectedState';

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

foreign import stdcall safe "InternetGetConnectedState"
  c_InternetGetConnectedState :: Ptr Word32 -> Word32 -> IO CInt
-- lpdwFlags : INTERNET_CONNECTION* out -> Ptr Word32
-- dwReserved : DWORD optional -> 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 internetgetconnectedstate =
  foreign "InternetGetConnectedState"
    ((ptr uint32_t) @-> uint32_t @-> returning int32_t)
(* lpdwFlags : INTERNET_CONNECTION* out -> (ptr uint32_t) *)
(* dwReserved : DWORD optional -> 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 ("InternetGetConnectedState" internet-get-connected-state :convention :stdcall) :int32
  (lpdw-flags :pointer)   ; INTERNET_CONNECTION* out
  (dw-reserved :uint32))   ; DWORD optional
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $InternetGetConnectedState = Win32::API::More->new('WININET',
    'BOOL InternetGetConnectedState(LPVOID lpdwFlags, DWORD dwReserved)');
# my $ret = $InternetGetConnectedState->Call($lpdwFlags, $dwReserved);
# lpdwFlags : INTERNET_CONNECTION* out -> LPVOID
# dwReserved : DWORD optional -> DWORD
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。