phoneGetVolume

// TAPI32.dll
#include <windows.h>

INT phoneGetVolume(
    DWORD hPhone,
    DWORD dwHookSwitchDev,
    DWORD* lpdwVolume
);

<DllImport("TAPI32.dll", ExactSpelling:=True)>
Public Shared Function phoneGetVolume(
    hPhone As UInteger,   ' DWORD
    dwHookSwitchDev As UInteger,   ' DWORD
    ByRef lpdwVolume As UInteger   ' DWORD* in/out
) As Integer
End Function

' hPhone : DWORD
' dwHookSwitchDev : DWORD
' lpdwVolume : DWORD* in/out
Declare PtrSafe Function phoneGetVolume Lib "tapi32" ( _
    ByVal hPhone As Long, _
    ByVal dwHookSwitchDev As Long, _
    ByRef lpdwVolume 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

phoneGetVolume = ctypes.windll.tapi32.phoneGetVolume
phoneGetVolume.restype = ctypes.c_int
phoneGetVolume.argtypes = [
    wintypes.DWORD,  # hPhone : DWORD
    wintypes.DWORD,  # dwHookSwitchDev : DWORD
    ctypes.POINTER(wintypes.DWORD),  # lpdwVolume : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('TAPI32.dll')
phoneGetVolume = Fiddle::Function.new(
  lib['phoneGetVolume'],
  [
    -Fiddle::TYPE_INT,  # hPhone : DWORD
    -Fiddle::TYPE_INT,  # dwHookSwitchDev : DWORD
    Fiddle::TYPE_VOIDP,  # lpdwVolume : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "tapi32")]
extern "system" {
    fn phoneGetVolume(
        hPhone: u32,  // DWORD
        dwHookSwitchDev: u32,  // DWORD
        lpdwVolume: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("TAPI32.dll")]
public static extern int phoneGetVolume(uint hPhone, uint dwHookSwitchDev, ref uint lpdwVolume);
"@
$api = Add-Type -MemberDefinition $sig -Name 'TAPI32_phoneGetVolume' -Namespace Win32 -PassThru
# $api::phoneGetVolume(hPhone, dwHookSwitchDev, lpdwVolume)

#uselib "TAPI32.dll"
#func global phoneGetVolume "phoneGetVolume" sptr, sptr, sptr
; phoneGetVolume hPhone, dwHookSwitchDev, varptr(lpdwVolume)   ; 戻り値は stat
; hPhone : DWORD -> "sptr"
; dwHookSwitchDev : DWORD -> "sptr"
; lpdwVolume : 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。

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

var (
	tapi32 = windows.NewLazySystemDLL("TAPI32.dll")
	procphoneGetVolume = tapi32.NewProc("phoneGetVolume")
)

// hPhone (DWORD), dwHookSwitchDev (DWORD), lpdwVolume (DWORD* in/out)
r1, _, err := procphoneGetVolume.Call(
	uintptr(hPhone),
	uintptr(dwHookSwitchDev),
	uintptr(lpdwVolume),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function phoneGetVolume(
  hPhone: DWORD;   // DWORD
  dwHookSwitchDev: DWORD;   // DWORD
  lpdwVolume: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'TAPI32.dll' name 'phoneGetVolume';

result := DllCall("TAPI32\phoneGetVolume"
    , "UInt", hPhone   ; DWORD
    , "UInt", dwHookSwitchDev   ; DWORD
    , "Ptr", lpdwVolume   ; DWORD* in/out
    , "Int")   ; return: INT

●phoneGetVolume(hPhone, dwHookSwitchDev, lpdwVolume) = DLL("TAPI32.dll", "int phoneGetVolume(dword, dword, void*)")
# 呼び出し: phoneGetVolume(hPhone, dwHookSwitchDev, lpdwVolume)
# hPhone : DWORD -> "dword"
# dwHookSwitchDev : DWORD -> "dword"
# lpdwVolume : 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)。

const std = @import("std");

extern "tapi32" fn phoneGetVolume(
    hPhone: u32, // DWORD
    dwHookSwitchDev: u32, // DWORD
    lpdwVolume: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) i32;

proc phoneGetVolume(
    hPhone: uint32,  # DWORD
    dwHookSwitchDev: uint32,  # DWORD
    lpdwVolume: ptr uint32  # DWORD* in/out
): int32 {.importc: "phoneGetVolume", stdcall, dynlib: "TAPI32.dll".}

pragma(lib, "tapi32");
extern(Windows)
int phoneGetVolume(
    uint hPhone,   // DWORD
    uint dwHookSwitchDev,   // DWORD
    uint* lpdwVolume   // DWORD* in/out
);

ccall((:phoneGetVolume, "TAPI32.dll"), stdcall, Int32,
      (UInt32, UInt32, Ptr{UInt32}),
      hPhone, dwHookSwitchDev, lpdwVolume)
# hPhone : DWORD -> UInt32
# dwHookSwitchDev : DWORD -> UInt32
# lpdwVolume : DWORD* in/out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t phoneGetVolume(
    uint32_t hPhone,
    uint32_t dwHookSwitchDev,
    uint32_t* lpdwVolume);
]]
local tapi32 = ffi.load("tapi32")
-- tapi32.phoneGetVolume(hPhone, dwHookSwitchDev, lpdwVolume)
-- hPhone : DWORD
-- dwHookSwitchDev : DWORD
-- lpdwVolume : DWORD* in/out
-- 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('TAPI32.dll');
const phoneGetVolume = lib.func('__stdcall', 'phoneGetVolume', 'int32_t', ['uint32_t', 'uint32_t', 'uint32_t *']);
// phoneGetVolume(hPhone, dwHookSwitchDev, lpdwVolume)
// hPhone : DWORD -> 'uint32_t'
// dwHookSwitchDev : DWORD -> 'uint32_t'
// lpdwVolume : DWORD* in/out -> '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("TAPI32.dll", {
  phoneGetVolume: { parameters: ["u32", "u32", "pointer"], result: "i32" },
});
// lib.symbols.phoneGetVolume(hPhone, dwHookSwitchDev, lpdwVolume)
// hPhone : DWORD -> "u32"
// dwHookSwitchDev : DWORD -> "u32"
// lpdwVolume : DWORD* in/out -> "pointer"
// 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 phoneGetVolume(
    uint32_t hPhone,
    uint32_t dwHookSwitchDev,
    uint32_t* lpdwVolume);
C, "TAPI32.dll");
// $ffi->phoneGetVolume(hPhone, dwHookSwitchDev, lpdwVolume);
// hPhone : DWORD
// dwHookSwitchDev : DWORD
// lpdwVolume : DWORD* in/out
// 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 Tapi32 extends StdCallLibrary {
    Tapi32 INSTANCE = Native.load("tapi32", Tapi32.class);
    int phoneGetVolume(
        int hPhone,   // DWORD
        int dwHookSwitchDev,   // DWORD
        IntByReference lpdwVolume   // DWORD* in/out
    );
}

@[Link("tapi32")]
lib LibTAPI32
  fun phoneGetVolume = phoneGetVolume(
    hPhone : UInt32,   # DWORD
    dwHookSwitchDev : UInt32,   # DWORD
    lpdwVolume : UInt32*   # DWORD* in/out
  ) : 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 phoneGetVolumeNative = Int32 Function(Uint32, Uint32, Pointer<Uint32>);
typedef phoneGetVolumeDart = int Function(int, int, Pointer<Uint32>);
final phoneGetVolume = DynamicLibrary.open('TAPI32.dll')
    .lookupFunction<phoneGetVolumeNative, phoneGetVolumeDart>('phoneGetVolume');
// hPhone : DWORD -> Uint32
// dwHookSwitchDev : DWORD -> Uint32
// lpdwVolume : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function phoneGetVolume(
  hPhone: DWORD;   // DWORD
  dwHookSwitchDev: DWORD;   // DWORD
  lpdwVolume: Pointer   // DWORD* in/out
): Integer; stdcall;
  external 'TAPI32.dll' name 'phoneGetVolume';

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

foreign import stdcall safe "phoneGetVolume"
  c_phoneGetVolume :: Word32 -> Word32 -> Ptr Word32 -> IO Int32
-- hPhone : DWORD -> Word32
-- dwHookSwitchDev : DWORD -> Word32
-- lpdwVolume : DWORD* in/out -> Ptr 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 phonegetvolume =
  foreign "phoneGetVolume"
    (uint32_t @-> uint32_t @-> (ptr uint32_t) @-> returning int32_t)
(* hPhone : DWORD -> uint32_t *)
(* dwHookSwitchDev : DWORD -> uint32_t *)
(* lpdwVolume : DWORD* in/out -> (ptr 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 tapi32 (t "TAPI32.dll"))
(cffi:use-foreign-library tapi32)

(cffi:defcfun ("phoneGetVolume" phone-get-volume :convention :stdcall) :int32
  (h-phone :uint32)   ; DWORD
  (dw-hook-switch-dev :uint32)   ; DWORD
  (lpdw-volume :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $phoneGetVolume = Win32::API::More->new('TAPI32',
    'int phoneGetVolume(DWORD hPhone, DWORD dwHookSwitchDev, LPVOID lpdwVolume)');
# my $ret = $phoneGetVolume->Call($hPhone, $dwHookSwitchDev, $lpdwVolume);
# hPhone : DWORD -> DWORD
# dwHookSwitchDev : DWORD -> DWORD
# lpdwVolume : DWORD* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。