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DevGetObjectProperties

関数
指定IDのデバイスオブジェクトのプロパティを取得する。
DLLapi-ms-win-devices-query-l1-1-0.dll呼出規約winapi

シグネチャ

// api-ms-win-devices-query-l1-1-0.dll
#include <windows.h>

HRESULT DevGetObjectProperties(
    DEV_OBJECT_TYPE ObjectType,
    LPCWSTR pszObjectId,
    DWORD QueryFlags,
    DWORD cRequestedProperties,
    const DEVPROPCOMPKEY* pRequestedProperties,
    DWORD* pcPropertyCount,
    const DEVPROPERTY** ppProperties
);

パラメーター

名前型方向説明
ObjectTypeDEV_OBJECT_TYPEin問い合わせ対象のオブジェクト種別を示すDEV_OBJECT_TYPE列挙値。
pszObjectIdLPCWSTRinプロパティを取得する対象オブジェクトのID文字列(Unicode)。
QueryFlagsDWORDinクエリ動作を制御するDEVQUERYFLAGSビットフラグ。
cRequestedPropertiesDWORDin要求するプロパティ数。pRequestedProperties配列の要素数。0で全件取得。
pRequestedPropertiesDEVPROPCOMPKEY*in取得したいプロパティを示すDEVPROPCOMPKEY配列へのポインター。NULL可。
pcPropertyCountDWORD*out取得されたプロパティ数を受け取るDWORDへのポインター。
ppPropertiesDEVPROPERTY**out取得結果のDEVPROPERTY配列を受け取るポインター。DevFreeObjectPropertiesで解放する。

戻り値の型: HRESULT

各言語での呼び出し定義

// api-ms-win-devices-query-l1-1-0.dll
#include <windows.h>

HRESULT DevGetObjectProperties(
    DEV_OBJECT_TYPE ObjectType,
    LPCWSTR pszObjectId,
    DWORD QueryFlags,
    DWORD cRequestedProperties,
    const DEVPROPCOMPKEY* pRequestedProperties,
    DWORD* pcPropertyCount,
    const DEVPROPERTY** ppProperties
);
[DllImport("api-ms-win-devices-query-l1-1-0.dll", ExactSpelling = true)]
static extern int DevGetObjectProperties(
    int ObjectType,   // DEV_OBJECT_TYPE
    [MarshalAs(UnmanagedType.LPWStr)] string pszObjectId,   // LPCWSTR
    uint QueryFlags,   // DWORD
    uint cRequestedProperties,   // DWORD
    IntPtr pRequestedProperties,   // DEVPROPCOMPKEY*
    out uint pcPropertyCount,   // DWORD* out
    IntPtr ppProperties   // DEVPROPERTY** out
);
<DllImport("api-ms-win-devices-query-l1-1-0.dll", ExactSpelling:=True)>
Public Shared Function DevGetObjectProperties(
    ObjectType As Integer,   ' DEV_OBJECT_TYPE
    <MarshalAs(UnmanagedType.LPWStr)> pszObjectId As String,   ' LPCWSTR
    QueryFlags As UInteger,   ' DWORD
    cRequestedProperties As UInteger,   ' DWORD
    pRequestedProperties As IntPtr,   ' DEVPROPCOMPKEY*
    <Out> ByRef pcPropertyCount As UInteger,   ' DWORD* out
    ppProperties As IntPtr   ' DEVPROPERTY** out
) As Integer
End Function
' ObjectType : DEV_OBJECT_TYPE
' pszObjectId : LPCWSTR
' QueryFlags : DWORD
' cRequestedProperties : DWORD
' pRequestedProperties : DEVPROPCOMPKEY*
' pcPropertyCount : DWORD* out
' ppProperties : DEVPROPERTY** out
Declare PtrSafe Function DevGetObjectProperties Lib "api-ms-win-devices-query-l1-1-0" ( _
    ByVal ObjectType As Long, _
    ByVal pszObjectId As LongPtr, _
    ByVal QueryFlags As Long, _
    ByVal cRequestedProperties As Long, _
    ByVal pRequestedProperties As LongPtr, _
    ByRef pcPropertyCount As Long, _
    ByVal ppProperties 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

DevGetObjectProperties = ctypes.windll.LoadLibrary("api-ms-win-devices-query-l1-1-0.dll").DevGetObjectProperties
DevGetObjectProperties.restype = ctypes.c_int
DevGetObjectProperties.argtypes = [
    ctypes.c_int,  # ObjectType : DEV_OBJECT_TYPE
    wintypes.LPCWSTR,  # pszObjectId : LPCWSTR
    wintypes.DWORD,  # QueryFlags : DWORD
    wintypes.DWORD,  # cRequestedProperties : DWORD
    ctypes.c_void_p,  # pRequestedProperties : DEVPROPCOMPKEY*
    ctypes.POINTER(wintypes.DWORD),  # pcPropertyCount : DWORD* out
    ctypes.c_void_p,  # ppProperties : DEVPROPERTY** out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('api-ms-win-devices-query-l1-1-0.dll')
DevGetObjectProperties = Fiddle::Function.new(
  lib['DevGetObjectProperties'],
  [
    Fiddle::TYPE_INT,  # ObjectType : DEV_OBJECT_TYPE
    Fiddle::TYPE_VOIDP,  # pszObjectId : LPCWSTR
    -Fiddle::TYPE_INT,  # QueryFlags : DWORD
    -Fiddle::TYPE_INT,  # cRequestedProperties : DWORD
    Fiddle::TYPE_VOIDP,  # pRequestedProperties : DEVPROPCOMPKEY*
    Fiddle::TYPE_VOIDP,  # pcPropertyCount : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppProperties : DEVPROPERTY** out
  ],
  Fiddle::TYPE_INT)
#[link(name = "api-ms-win-devices-query-l1-1-0")]
extern "system" {
    fn DevGetObjectProperties(
        ObjectType: i32,  // DEV_OBJECT_TYPE
        pszObjectId: *const u16,  // LPCWSTR
        QueryFlags: u32,  // DWORD
        cRequestedProperties: u32,  // DWORD
        pRequestedProperties: *const DEVPROPCOMPKEY,  // DEVPROPCOMPKEY*
        pcPropertyCount: *mut u32,  // DWORD* out
        ppProperties: *const *const DEVPROPERTY  // DEVPROPERTY** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[DllImport("api-ms-win-devices-query-l1-1-0.dll")]
public static extern int DevGetObjectProperties(int ObjectType, [MarshalAs(UnmanagedType.LPWStr)] string pszObjectId, uint QueryFlags, uint cRequestedProperties, IntPtr pRequestedProperties, out uint pcPropertyCount, IntPtr ppProperties);
"@
$api = Add-Type -MemberDefinition $sig -Name 'api-ms-win-devices-query-l1-1-0_DevGetObjectProperties' -Namespace Win32 -PassThru
# $api::DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
#uselib "api-ms-win-devices-query-l1-1-0.dll"
#func global DevGetObjectProperties "DevGetObjectProperties" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; DevGetObjectProperties ObjectType, pszObjectId, QueryFlags, cRequestedProperties, varptr(pRequestedProperties), varptr(pcPropertyCount), varptr(ppProperties)   ; 戻り値は stat
; ObjectType : DEV_OBJECT_TYPE -> "sptr"
; pszObjectId : LPCWSTR -> "sptr"
; QueryFlags : DWORD -> "sptr"
; cRequestedProperties : DWORD -> "sptr"
; pRequestedProperties : DEVPROPCOMPKEY* -> "sptr"
; pcPropertyCount : DWORD* out -> "sptr"
; ppProperties : DEVPROPERTY** 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。
出力引数: 
#uselib "api-ms-win-devices-query-l1-1-0.dll"
#cfunc global DevGetObjectProperties "DevGetObjectProperties" int, wstr, int, int, var, var, var
; res = DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
; ObjectType : DEV_OBJECT_TYPE -> "int"
; pszObjectId : LPCWSTR -> "wstr"
; QueryFlags : DWORD -> "int"
; cRequestedProperties : DWORD -> "int"
; pRequestedProperties : DEVPROPCOMPKEY* -> "var"
; pcPropertyCount : DWORD* out -> "var"
; ppProperties : DEVPROPERTY** out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
出力引数: 
; HRESULT DevGetObjectProperties(DEV_OBJECT_TYPE ObjectType, LPCWSTR pszObjectId, DWORD QueryFlags, DWORD cRequestedProperties, DEVPROPCOMPKEY* pRequestedProperties, DWORD* pcPropertyCount, DEVPROPERTY** ppProperties)
#uselib "api-ms-win-devices-query-l1-1-0.dll"
#cfunc global DevGetObjectProperties "DevGetObjectProperties" int, wstr, int, int, var, var, var
; res = DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
; ObjectType : DEV_OBJECT_TYPE -> "int"
; pszObjectId : LPCWSTR -> "wstr"
; QueryFlags : DWORD -> "int"
; cRequestedProperties : DWORD -> "int"
; pRequestedProperties : DEVPROPCOMPKEY* -> "var"
; pcPropertyCount : DWORD* out -> "var"
; ppProperties : DEVPROPERTY** out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。
import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	api_ms_win_devices_query_l1_1_0 = windows.NewLazySystemDLL("api-ms-win-devices-query-l1-1-0.dll")
	procDevGetObjectProperties = api_ms_win_devices_query_l1_1_0.NewProc("DevGetObjectProperties")
)

// ObjectType (DEV_OBJECT_TYPE), pszObjectId (LPCWSTR), QueryFlags (DWORD), cRequestedProperties (DWORD), pRequestedProperties (DEVPROPCOMPKEY*), pcPropertyCount (DWORD* out), ppProperties (DEVPROPERTY** out)
r1, _, err := procDevGetObjectProperties.Call(
	uintptr(ObjectType),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszObjectId))),
	uintptr(QueryFlags),
	uintptr(cRequestedProperties),
	uintptr(pRequestedProperties),
	uintptr(pcPropertyCount),
	uintptr(ppProperties),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT
function DevGetObjectProperties(
  ObjectType: Integer;   // DEV_OBJECT_TYPE
  pszObjectId: PWideChar;   // LPCWSTR
  QueryFlags: DWORD;   // DWORD
  cRequestedProperties: DWORD;   // DWORD
  pRequestedProperties: Pointer;   // DEVPROPCOMPKEY*
  pcPropertyCount: Pointer;   // DWORD* out
  ppProperties: Pointer   // DEVPROPERTY** out
): Integer; stdcall;
  external 'api-ms-win-devices-query-l1-1-0.dll' name 'DevGetObjectProperties';
result := DllCall("api-ms-win-devices-query-l1-1-0\DevGetObjectProperties"
    , "Int", ObjectType   ; DEV_OBJECT_TYPE
    , "WStr", pszObjectId   ; LPCWSTR
    , "UInt", QueryFlags   ; DWORD
    , "UInt", cRequestedProperties   ; DWORD
    , "Ptr", pRequestedProperties   ; DEVPROPCOMPKEY*
    , "Ptr", pcPropertyCount   ; DWORD* out
    , "Ptr", ppProperties   ; DEVPROPERTY** out
    , "Int")   ; return: HRESULT
●DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties) = DLL("api-ms-win-devices-query-l1-1-0.dll", "int DevGetObjectProperties(int, char*, dword, dword, void*, void*, void*)")
# 呼び出し: DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
# ObjectType : DEV_OBJECT_TYPE -> "int"
# pszObjectId : LPCWSTR -> "char*"
# QueryFlags : DWORD -> "dword"
# cRequestedProperties : DWORD -> "dword"
# pRequestedProperties : DEVPROPCOMPKEY* -> "void*"
# pcPropertyCount : DWORD* out -> "void*"
# ppProperties : DEVPROPERTY** 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 "api-ms-win-devices-query-l1-1-0" fn DevGetObjectProperties(
    ObjectType: i32, // DEV_OBJECT_TYPE
    pszObjectId: [*c]const u16, // LPCWSTR
    QueryFlags: u32, // DWORD
    cRequestedProperties: u32, // DWORD
    pRequestedProperties: [*c]DEVPROPCOMPKEY, // DEVPROPCOMPKEY*
    pcPropertyCount: [*c]u32, // DWORD* out
    ppProperties: [*c][*c]DEVPROPERTY // DEVPROPERTY** out
) callconv(std.os.windows.WINAPI) i32;
proc DevGetObjectProperties(
    ObjectType: int32,  # DEV_OBJECT_TYPE
    pszObjectId: WideCString,  # LPCWSTR
    QueryFlags: uint32,  # DWORD
    cRequestedProperties: uint32,  # DWORD
    pRequestedProperties: ptr DEVPROPCOMPKEY,  # DEVPROPCOMPKEY*
    pcPropertyCount: ptr uint32,  # DWORD* out
    ppProperties: ptr DEVPROPERTY  # DEVPROPERTY** out
): int32 {.importc: "DevGetObjectProperties", stdcall, dynlib: "api-ms-win-devices-query-l1-1-0.dll".}
pragma(lib, "api-ms-win-devices-query-l1-1-0");
extern(Windows)
int DevGetObjectProperties(
    int ObjectType,   // DEV_OBJECT_TYPE
    const(wchar)* pszObjectId,   // LPCWSTR
    uint QueryFlags,   // DWORD
    uint cRequestedProperties,   // DWORD
    DEVPROPCOMPKEY* pRequestedProperties,   // DEVPROPCOMPKEY*
    uint* pcPropertyCount,   // DWORD* out
    DEVPROPERTY** ppProperties   // DEVPROPERTY** out
);
ccall((:DevGetObjectProperties, "api-ms-win-devices-query-l1-1-0.dll"), stdcall, Int32,
      (Int32, Cwstring, UInt32, UInt32, Ptr{DEVPROPCOMPKEY}, Ptr{UInt32}, Ptr{DEVPROPERTY}),
      ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
# ObjectType : DEV_OBJECT_TYPE -> Int32
# pszObjectId : LPCWSTR -> Cwstring
# QueryFlags : DWORD -> UInt32
# cRequestedProperties : DWORD -> UInt32
# pRequestedProperties : DEVPROPCOMPKEY* -> Ptr{DEVPROPCOMPKEY}
# pcPropertyCount : DWORD* out -> Ptr{UInt32}
# ppProperties : DEVPROPERTY** out -> Ptr{DEVPROPERTY}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。
local ffi = require("ffi")
ffi.cdef[[
int32_t DevGetObjectProperties(
    int32_t ObjectType,
    const uint16_t* pszObjectId,
    uint32_t QueryFlags,
    uint32_t cRequestedProperties,
    void* pRequestedProperties,
    uint32_t* pcPropertyCount,
    void* ppProperties);
]]
local api-ms-win-devices-query-l1-1-0 = ffi.load("api-ms-win-devices-query-l1-1-0")
-- api-ms-win-devices-query-l1-1-0.DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
-- ObjectType : DEV_OBJECT_TYPE
-- pszObjectId : LPCWSTR
-- QueryFlags : DWORD
-- cRequestedProperties : DWORD
-- pRequestedProperties : DEVPROPCOMPKEY*
-- pcPropertyCount : DWORD* out
-- ppProperties : DEVPROPERTY** 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('api-ms-win-devices-query-l1-1-0.dll');
const DevGetObjectProperties = lib.func('__stdcall', 'DevGetObjectProperties', 'int32_t', ['int32_t', 'str16', 'uint32_t', 'uint32_t', 'void *', 'uint32_t *', 'void *']);
// DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
// ObjectType : DEV_OBJECT_TYPE -> 'int32_t'
// pszObjectId : LPCWSTR -> 'str16'
// QueryFlags : DWORD -> 'uint32_t'
// cRequestedProperties : DWORD -> 'uint32_t'
// pRequestedProperties : DEVPROPCOMPKEY* -> 'void *'
// pcPropertyCount : DWORD* out -> 'uint32_t *'
// ppProperties : DEVPROPERTY** out -> 'void *'
// 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("api-ms-win-devices-query-l1-1-0.dll", {
  DevGetObjectProperties: { parameters: ["i32", "buffer", "u32", "u32", "pointer", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties)
// ObjectType : DEV_OBJECT_TYPE -> "i32"
// pszObjectId : LPCWSTR -> "buffer"
// QueryFlags : DWORD -> "u32"
// cRequestedProperties : DWORD -> "u32"
// pRequestedProperties : DEVPROPCOMPKEY* -> "pointer"
// pcPropertyCount : DWORD* out -> "pointer"
// ppProperties : DEVPROPERTY** 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 DevGetObjectProperties(
    int32_t ObjectType,
    const uint16_t* pszObjectId,
    uint32_t QueryFlags,
    uint32_t cRequestedProperties,
    void* pRequestedProperties,
    uint32_t* pcPropertyCount,
    void* ppProperties);
C, "api-ms-win-devices-query-l1-1-0.dll");
// $ffi->DevGetObjectProperties(ObjectType, pszObjectId, QueryFlags, cRequestedProperties, pRequestedProperties, pcPropertyCount, ppProperties);
// ObjectType : DEV_OBJECT_TYPE
// pszObjectId : LPCWSTR
// QueryFlags : DWORD
// cRequestedProperties : DWORD
// pRequestedProperties : DEVPROPCOMPKEY*
// pcPropertyCount : DWORD* out
// ppProperties : DEVPROPERTY** 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 Api-ms-win-devices-query-l1-1-0 extends StdCallLibrary {
    Api-ms-win-devices-query-l1-1-0 INSTANCE = Native.load("api-ms-win-devices-query-l1-1-0", Api-ms-win-devices-query-l1-1-0.class);
    int DevGetObjectProperties(
        int ObjectType,   // DEV_OBJECT_TYPE
        WString pszObjectId,   // LPCWSTR
        int QueryFlags,   // DWORD
        int cRequestedProperties,   // DWORD
        Pointer pRequestedProperties,   // DEVPROPCOMPKEY*
        IntByReference pcPropertyCount,   // DWORD* out
        Pointer ppProperties   // DEVPROPERTY** out
    );
}
@[Link("api-ms-win-devices-query-l1-1-0")]
lib Libapi-ms-win-devices-query-l1-1-0
  fun DevGetObjectProperties = DevGetObjectProperties(
    ObjectType : Int32,   # DEV_OBJECT_TYPE
    pszObjectId : UInt16*,   # LPCWSTR
    QueryFlags : UInt32,   # DWORD
    cRequestedProperties : UInt32,   # DWORD
    pRequestedProperties : DEVPROPCOMPKEY*,   # DEVPROPCOMPKEY*
    pcPropertyCount : UInt32*,   # DWORD* out
    ppProperties : DEVPROPERTY**   # DEVPROPERTY** 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 DevGetObjectPropertiesNative = Int32 Function(Int32, Pointer<Utf16>, Uint32, Uint32, Pointer<Void>, Pointer<Uint32>, Pointer<Void>);
typedef DevGetObjectPropertiesDart = int Function(int, Pointer<Utf16>, int, int, Pointer<Void>, Pointer<Uint32>, Pointer<Void>);
final DevGetObjectProperties = DynamicLibrary.open('api-ms-win-devices-query-l1-1-0.dll')
    .lookupFunction<DevGetObjectPropertiesNative, DevGetObjectPropertiesDart>('DevGetObjectProperties');
// ObjectType : DEV_OBJECT_TYPE -> Int32
// pszObjectId : LPCWSTR -> Pointer<Utf16>
// QueryFlags : DWORD -> Uint32
// cRequestedProperties : DWORD -> Uint32
// pRequestedProperties : DEVPROPCOMPKEY* -> Pointer<Void>
// pcPropertyCount : DWORD* out -> Pointer<Uint32>
// ppProperties : DEVPROPERTY** out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function DevGetObjectProperties(
  ObjectType: Integer;   // DEV_OBJECT_TYPE
  pszObjectId: PWideChar;   // LPCWSTR
  QueryFlags: DWORD;   // DWORD
  cRequestedProperties: DWORD;   // DWORD
  pRequestedProperties: Pointer;   // DEVPROPCOMPKEY*
  pcPropertyCount: Pointer;   // DWORD* out
  ppProperties: Pointer   // DEVPROPERTY** out
): Integer; stdcall;
  external 'api-ms-win-devices-query-l1-1-0.dll' name 'DevGetObjectProperties';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "DevGetObjectProperties"
  c_DevGetObjectProperties :: Int32 -> CWString -> Word32 -> Word32 -> Ptr () -> Ptr Word32 -> Ptr () -> IO Int32
-- ObjectType : DEV_OBJECT_TYPE -> Int32
-- pszObjectId : LPCWSTR -> CWString
-- QueryFlags : DWORD -> Word32
-- cRequestedProperties : DWORD -> Word32
-- pRequestedProperties : DEVPROPCOMPKEY* -> Ptr ()
-- pcPropertyCount : DWORD* out -> Ptr Word32
-- ppProperties : DEVPROPERTY** out -> Ptr ()
-- 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 devgetobjectproperties =
  foreign "DevGetObjectProperties"
    (int32_t @-> (ptr uint16_t) @-> uint32_t @-> uint32_t @-> (ptr void) @-> (ptr uint32_t) @-> (ptr void) @-> returning int32_t)
(* ObjectType : DEV_OBJECT_TYPE -> int32_t *)
(* pszObjectId : LPCWSTR -> (ptr uint16_t) *)
(* QueryFlags : DWORD -> uint32_t *)
(* cRequestedProperties : DWORD -> uint32_t *)
(* pRequestedProperties : DEVPROPCOMPKEY* -> (ptr void) *)
(* pcPropertyCount : DWORD* out -> (ptr uint32_t) *)
(* ppProperties : DEVPROPERTY** out -> (ptr void) *)
(* 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 api-ms-win-devices-query-l1-1-0 (t "api-ms-win-devices-query-l1-1-0.dll"))
(cffi:use-foreign-library api-ms-win-devices-query-l1-1-0)

(cffi:defcfun ("DevGetObjectProperties" dev-get-object-properties :convention :stdcall) :int32
  (object-type :int32)   ; DEV_OBJECT_TYPE
  (psz-object-id (:string :encoding :utf-16le))   ; LPCWSTR
  (query-flags :uint32)   ; DWORD
  (c-requested-properties :uint32)   ; DWORD
  (p-requested-properties :pointer)   ; DEVPROPCOMPKEY*
  (pc-property-count :pointer)   ; DWORD* out
  (pp-properties :pointer))   ; DEVPROPERTY** out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $DevGetObjectProperties = Win32::API::More->new('api-ms-win-devices-query-l1-1-0',
    'int DevGetObjectProperties(int ObjectType, LPCWSTR pszObjectId, DWORD QueryFlags, DWORD cRequestedProperties, LPVOID pRequestedProperties, LPVOID pcPropertyCount, LPVOID ppProperties)');
# my $ret = $DevGetObjectProperties->Call($ObjectType, $pszObjectId, $QueryFlags, $cRequestedProperties, $pRequestedProperties, $pcPropertyCount, $ppProperties);
# ObjectType : DEV_OBJECT_TYPE -> int
# pszObjectId : LPCWSTR -> LPCWSTR
# QueryFlags : DWORD -> DWORD
# cRequestedProperties : DWORD -> DWORD
# pRequestedProperties : DEVPROPCOMPKEY* -> LPVOID
# pcPropertyCount : DWORD* out -> LPVOID
# ppProperties : DEVPROPERTY** out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

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