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EcGetSubscriptionProperty

関数
サブスクリプションのプロパティ値を取得する。
DLLWecApi.dll呼出規約winapi対応OSWindows Vista 以降
📘 Microsoft Learn (日本語) · English

シグネチャ

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

BOOL EcGetSubscriptionProperty(
    INT_PTR Subscription,
    EC_SUBSCRIPTION_PROPERTY_ID PropertyId,
    DWORD Flags,
    DWORD PropertyValueBufferSize,
    EC_VARIANT* PropertyValueBuffer,
    DWORD* PropertyValueBufferUsed
);

パラメーター

名前型方向説明
SubscriptionINT_PTRinEcOpenSubscriptionで取得したサブスクリプションのハンドル。対象の購読を指定する。
PropertyIdEC_SUBSCRIPTION_PROPERTY_IDin取得するプロパティの種別を示すEC_SUBSCRIPTION_PROPERTY_ID列挙値。
FlagsDWORDin予約済みで0を指定する。将来の拡張用フラグである。
PropertyValueBufferSizeDWORDinPropertyValueBufferのサイズをバイト単位で指定する。必要量問い合わせ時は0可。
PropertyValueBufferEC_VARIANT*inout取得したプロパティ値を格納するEC_VARIANT構造体へのバッファ。NULL可で必要量取得に使う。
PropertyValueBufferUsedDWORD*out実際に使用された、または必要なバイト数を受け取る出力ポインタ。

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL EcGetSubscriptionProperty(
    INT_PTR Subscription,
    EC_SUBSCRIPTION_PROPERTY_ID PropertyId,
    DWORD Flags,
    DWORD PropertyValueBufferSize,
    EC_VARIANT* PropertyValueBuffer,
    DWORD* PropertyValueBufferUsed
);
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WecApi.dll", ExactSpelling = true)]
static extern bool EcGetSubscriptionProperty(
    IntPtr Subscription,   // INT_PTR
    int PropertyId,   // EC_SUBSCRIPTION_PROPERTY_ID
    uint Flags,   // DWORD
    uint PropertyValueBufferSize,   // DWORD
    IntPtr PropertyValueBuffer,   // EC_VARIANT* in/out
    out uint PropertyValueBufferUsed   // DWORD* out
);
<DllImport("WecApi.dll", ExactSpelling:=True)>
Public Shared Function EcGetSubscriptionProperty(
    Subscription As IntPtr,   ' INT_PTR
    PropertyId As Integer,   ' EC_SUBSCRIPTION_PROPERTY_ID
    Flags As UInteger,   ' DWORD
    PropertyValueBufferSize As UInteger,   ' DWORD
    PropertyValueBuffer As IntPtr,   ' EC_VARIANT* in/out
    <Out> ByRef PropertyValueBufferUsed As UInteger   ' DWORD* out
) As <MarshalAs(UnmanagedType.Bool)> Boolean
End Function
' Subscription : INT_PTR
' PropertyId : EC_SUBSCRIPTION_PROPERTY_ID
' Flags : DWORD
' PropertyValueBufferSize : DWORD
' PropertyValueBuffer : EC_VARIANT* in/out
' PropertyValueBufferUsed : DWORD* out
Declare PtrSafe Function EcGetSubscriptionProperty Lib "wecapi" ( _
    ByVal Subscription As LongPtr, _
    ByVal PropertyId As Long, _
    ByVal Flags As Long, _
    ByVal PropertyValueBufferSize As Long, _
    ByVal PropertyValueBuffer As LongPtr, _
    ByRef PropertyValueBufferUsed 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

EcGetSubscriptionProperty = ctypes.windll.wecapi.EcGetSubscriptionProperty
EcGetSubscriptionProperty.restype = wintypes.BOOL
EcGetSubscriptionProperty.argtypes = [
    ctypes.c_ssize_t,  # Subscription : INT_PTR
    ctypes.c_int,  # PropertyId : EC_SUBSCRIPTION_PROPERTY_ID
    wintypes.DWORD,  # Flags : DWORD
    wintypes.DWORD,  # PropertyValueBufferSize : DWORD
    ctypes.c_void_p,  # PropertyValueBuffer : EC_VARIANT* in/out
    ctypes.POINTER(wintypes.DWORD),  # PropertyValueBufferUsed : DWORD* out
]
require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WecApi.dll')
EcGetSubscriptionProperty = Fiddle::Function.new(
  lib['EcGetSubscriptionProperty'],
  [
    Fiddle::TYPE_INTPTR_T,  # Subscription : INT_PTR
    Fiddle::TYPE_INT,  # PropertyId : EC_SUBSCRIPTION_PROPERTY_ID
    -Fiddle::TYPE_INT,  # Flags : DWORD
    -Fiddle::TYPE_INT,  # PropertyValueBufferSize : DWORD
    Fiddle::TYPE_VOIDP,  # PropertyValueBuffer : EC_VARIANT* in/out
    Fiddle::TYPE_VOIDP,  # PropertyValueBufferUsed : DWORD* out
  ],
  Fiddle::TYPE_INT)
#[link(name = "wecapi")]
extern "system" {
    fn EcGetSubscriptionProperty(
        Subscription: isize,  // INT_PTR
        PropertyId: i32,  // EC_SUBSCRIPTION_PROPERTY_ID
        Flags: u32,  // DWORD
        PropertyValueBufferSize: u32,  // DWORD
        PropertyValueBuffer: *mut EC_VARIANT,  // EC_VARIANT* in/out
        PropertyValueBufferUsed: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.
$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("WecApi.dll")]
public static extern bool EcGetSubscriptionProperty(IntPtr Subscription, int PropertyId, uint Flags, uint PropertyValueBufferSize, IntPtr PropertyValueBuffer, out uint PropertyValueBufferUsed);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WecApi_EcGetSubscriptionProperty' -Namespace Win32 -PassThru
# $api::EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
#uselib "WecApi.dll"
#func global EcGetSubscriptionProperty "EcGetSubscriptionProperty" sptr, sptr, sptr, sptr, sptr, sptr
; EcGetSubscriptionProperty Subscription, PropertyId, Flags, PropertyValueBufferSize, varptr(PropertyValueBuffer), varptr(PropertyValueBufferUsed)   ; 戻り値は stat
; Subscription : INT_PTR -> "sptr"
; PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> "sptr"
; Flags : DWORD -> "sptr"
; PropertyValueBufferSize : DWORD -> "sptr"
; PropertyValueBuffer : EC_VARIANT* in/out -> "sptr"
; PropertyValueBufferUsed : DWORD* 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 "WecApi.dll"
#cfunc global EcGetSubscriptionProperty "EcGetSubscriptionProperty" sptr, int, int, int, var, var
; res = EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
; Subscription : INT_PTR -> "sptr"
; PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> "int"
; Flags : DWORD -> "int"
; PropertyValueBufferSize : DWORD -> "int"
; PropertyValueBuffer : EC_VARIANT* in/out -> "var"
; PropertyValueBufferUsed : DWORD* 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: 
; BOOL EcGetSubscriptionProperty(INT_PTR Subscription, EC_SUBSCRIPTION_PROPERTY_ID PropertyId, DWORD Flags, DWORD PropertyValueBufferSize, EC_VARIANT* PropertyValueBuffer, DWORD* PropertyValueBufferUsed)
#uselib "WecApi.dll"
#cfunc global EcGetSubscriptionProperty "EcGetSubscriptionProperty" intptr, int, int, int, var, var
; res = EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
; Subscription : INT_PTR -> "intptr"
; PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> "int"
; Flags : DWORD -> "int"
; PropertyValueBufferSize : DWORD -> "int"
; PropertyValueBuffer : EC_VARIANT* in/out -> "var"
; PropertyValueBufferUsed : DWORD* 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 (
	wecapi = windows.NewLazySystemDLL("WecApi.dll")
	procEcGetSubscriptionProperty = wecapi.NewProc("EcGetSubscriptionProperty")
)

// Subscription (INT_PTR), PropertyId (EC_SUBSCRIPTION_PROPERTY_ID), Flags (DWORD), PropertyValueBufferSize (DWORD), PropertyValueBuffer (EC_VARIANT* in/out), PropertyValueBufferUsed (DWORD* out)
r1, _, err := procEcGetSubscriptionProperty.Call(
	uintptr(Subscription),
	uintptr(PropertyId),
	uintptr(Flags),
	uintptr(PropertyValueBufferSize),
	uintptr(PropertyValueBuffer),
	uintptr(PropertyValueBufferUsed),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL
function EcGetSubscriptionProperty(
  Subscription: NativeInt;   // INT_PTR
  PropertyId: Integer;   // EC_SUBSCRIPTION_PROPERTY_ID
  Flags: DWORD;   // DWORD
  PropertyValueBufferSize: DWORD;   // DWORD
  PropertyValueBuffer: Pointer;   // EC_VARIANT* in/out
  PropertyValueBufferUsed: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'WecApi.dll' name 'EcGetSubscriptionProperty';
result := DllCall("WecApi\EcGetSubscriptionProperty"
    , "Ptr", Subscription   ; INT_PTR
    , "Int", PropertyId   ; EC_SUBSCRIPTION_PROPERTY_ID
    , "UInt", Flags   ; DWORD
    , "UInt", PropertyValueBufferSize   ; DWORD
    , "Ptr", PropertyValueBuffer   ; EC_VARIANT* in/out
    , "Ptr", PropertyValueBufferUsed   ; DWORD* out
    , "Int")   ; return: BOOL
●EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed) = DLL("WecApi.dll", "bool EcGetSubscriptionProperty(int, int, dword, dword, void*, void*)")
# 呼び出し: EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
# Subscription : INT_PTR -> "int"
# PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> "int"
# Flags : DWORD -> "dword"
# PropertyValueBufferSize : DWORD -> "dword"
# PropertyValueBuffer : EC_VARIANT* in/out -> "void*"
# PropertyValueBufferUsed : DWORD* 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 "wecapi" fn EcGetSubscriptionProperty(
    Subscription: isize, // INT_PTR
    PropertyId: i32, // EC_SUBSCRIPTION_PROPERTY_ID
    Flags: u32, // DWORD
    PropertyValueBufferSize: u32, // DWORD
    PropertyValueBuffer: [*c]EC_VARIANT, // EC_VARIANT* in/out
    PropertyValueBufferUsed: [*c]u32 // DWORD* out
) callconv(std.os.windows.WINAPI) i32;
proc EcGetSubscriptionProperty(
    Subscription: int,  # INT_PTR
    PropertyId: int32,  # EC_SUBSCRIPTION_PROPERTY_ID
    Flags: uint32,  # DWORD
    PropertyValueBufferSize: uint32,  # DWORD
    PropertyValueBuffer: ptr EC_VARIANT,  # EC_VARIANT* in/out
    PropertyValueBufferUsed: ptr uint32  # DWORD* out
): int32 {.importc: "EcGetSubscriptionProperty", stdcall, dynlib: "WecApi.dll".}
pragma(lib, "wecapi");
extern(Windows)
int EcGetSubscriptionProperty(
    ptrdiff_t Subscription,   // INT_PTR
    int PropertyId,   // EC_SUBSCRIPTION_PROPERTY_ID
    uint Flags,   // DWORD
    uint PropertyValueBufferSize,   // DWORD
    EC_VARIANT* PropertyValueBuffer,   // EC_VARIANT* in/out
    uint* PropertyValueBufferUsed   // DWORD* out
);
ccall((:EcGetSubscriptionProperty, "WecApi.dll"), stdcall, Int32,
      (Int, Int32, UInt32, UInt32, Ptr{EC_VARIANT}, Ptr{UInt32}),
      Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
# Subscription : INT_PTR -> Int
# PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> Int32
# Flags : DWORD -> UInt32
# PropertyValueBufferSize : DWORD -> UInt32
# PropertyValueBuffer : EC_VARIANT* in/out -> Ptr{EC_VARIANT}
# PropertyValueBufferUsed : DWORD* 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 EcGetSubscriptionProperty(
    intptr_t Subscription,
    int32_t PropertyId,
    uint32_t Flags,
    uint32_t PropertyValueBufferSize,
    void* PropertyValueBuffer,
    uint32_t* PropertyValueBufferUsed);
]]
local wecapi = ffi.load("wecapi")
-- wecapi.EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
-- Subscription : INT_PTR
-- PropertyId : EC_SUBSCRIPTION_PROPERTY_ID
-- Flags : DWORD
-- PropertyValueBufferSize : DWORD
-- PropertyValueBuffer : EC_VARIANT* in/out
-- PropertyValueBufferUsed : DWORD* 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('WecApi.dll');
const EcGetSubscriptionProperty = lib.func('__stdcall', 'EcGetSubscriptionProperty', 'int32_t', ['intptr_t', 'int32_t', 'uint32_t', 'uint32_t', 'void *', 'uint32_t *']);
// EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
// Subscription : INT_PTR -> 'intptr_t'
// PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> 'int32_t'
// Flags : DWORD -> 'uint32_t'
// PropertyValueBufferSize : DWORD -> 'uint32_t'
// PropertyValueBuffer : EC_VARIANT* in/out -> 'void *'
// PropertyValueBufferUsed : DWORD* 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("WecApi.dll", {
  EcGetSubscriptionProperty: { parameters: ["isize", "i32", "u32", "u32", "pointer", "pointer"], result: "i32" },
});
// lib.symbols.EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed)
// Subscription : INT_PTR -> "isize"
// PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> "i32"
// Flags : DWORD -> "u32"
// PropertyValueBufferSize : DWORD -> "u32"
// PropertyValueBuffer : EC_VARIANT* in/out -> "pointer"
// PropertyValueBufferUsed : DWORD* 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 EcGetSubscriptionProperty(
    intptr_t Subscription,
    int32_t PropertyId,
    uint32_t Flags,
    uint32_t PropertyValueBufferSize,
    void* PropertyValueBuffer,
    uint32_t* PropertyValueBufferUsed);
C, "WecApi.dll");
// $ffi->EcGetSubscriptionProperty(Subscription, PropertyId, Flags, PropertyValueBufferSize, PropertyValueBuffer, PropertyValueBufferUsed);
// Subscription : INT_PTR
// PropertyId : EC_SUBSCRIPTION_PROPERTY_ID
// Flags : DWORD
// PropertyValueBufferSize : DWORD
// PropertyValueBuffer : EC_VARIANT* in/out
// PropertyValueBufferUsed : DWORD* 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 Wecapi extends StdCallLibrary {
    Wecapi INSTANCE = Native.load("wecapi", Wecapi.class);
    boolean EcGetSubscriptionProperty(
        long Subscription,   // INT_PTR
        int PropertyId,   // EC_SUBSCRIPTION_PROPERTY_ID
        int Flags,   // DWORD
        int PropertyValueBufferSize,   // DWORD
        Pointer PropertyValueBuffer,   // EC_VARIANT* in/out
        IntByReference PropertyValueBufferUsed   // DWORD* out
    );
}
@[Link("wecapi")]
lib LibWecApi
  fun EcGetSubscriptionProperty = EcGetSubscriptionProperty(
    Subscription : LibC::SSizeT,   # INT_PTR
    PropertyId : Int32,   # EC_SUBSCRIPTION_PROPERTY_ID
    Flags : UInt32,   # DWORD
    PropertyValueBufferSize : UInt32,   # DWORD
    PropertyValueBuffer : EC_VARIANT*,   # EC_VARIANT* in/out
    PropertyValueBufferUsed : UInt32*   # DWORD* 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 EcGetSubscriptionPropertyNative = Int32 Function(IntPtr, Int32, Uint32, Uint32, Pointer<Void>, Pointer<Uint32>);
typedef EcGetSubscriptionPropertyDart = int Function(int, int, int, int, Pointer<Void>, Pointer<Uint32>);
final EcGetSubscriptionProperty = DynamicLibrary.open('WecApi.dll')
    .lookupFunction<EcGetSubscriptionPropertyNative, EcGetSubscriptionPropertyDart>('EcGetSubscriptionProperty');
// Subscription : INT_PTR -> IntPtr
// PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> Int32
// Flags : DWORD -> Uint32
// PropertyValueBufferSize : DWORD -> Uint32
// PropertyValueBuffer : EC_VARIANT* in/out -> Pointer<Void>
// PropertyValueBufferUsed : DWORD* out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。
{$mode objfpc}{$H+}
function EcGetSubscriptionProperty(
  Subscription: NativeInt;   // INT_PTR
  PropertyId: Integer;   // EC_SUBSCRIPTION_PROPERTY_ID
  Flags: DWORD;   // DWORD
  PropertyValueBufferSize: DWORD;   // DWORD
  PropertyValueBuffer: Pointer;   // EC_VARIANT* in/out
  PropertyValueBufferUsed: Pointer   // DWORD* out
): BOOL; stdcall;
  external 'WecApi.dll' name 'EcGetSubscriptionProperty';
import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "EcGetSubscriptionProperty"
  c_EcGetSubscriptionProperty :: CIntPtr -> Int32 -> Word32 -> Word32 -> Ptr () -> Ptr Word32 -> IO CInt
-- Subscription : INT_PTR -> CIntPtr
-- PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> Int32
-- Flags : DWORD -> Word32
-- PropertyValueBufferSize : DWORD -> Word32
-- PropertyValueBuffer : EC_VARIANT* in/out -> Ptr ()
-- PropertyValueBufferUsed : DWORD* 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 ecgetsubscriptionproperty =
  foreign "EcGetSubscriptionProperty"
    (intptr_t @-> int32_t @-> uint32_t @-> uint32_t @-> (ptr void) @-> (ptr uint32_t) @-> returning int32_t)
(* Subscription : INT_PTR -> intptr_t *)
(* PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> int32_t *)
(* Flags : DWORD -> uint32_t *)
(* PropertyValueBufferSize : DWORD -> uint32_t *)
(* PropertyValueBuffer : EC_VARIANT* in/out -> (ptr void) *)
(* PropertyValueBufferUsed : DWORD* 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 wecapi (t "WecApi.dll"))
(cffi:use-foreign-library wecapi)

(cffi:defcfun ("EcGetSubscriptionProperty" ec-get-subscription-property :convention :stdcall) :int32
  (subscription :int64)   ; INT_PTR
  (property-id :int32)   ; EC_SUBSCRIPTION_PROPERTY_ID
  (flags :uint32)   ; DWORD
  (property-value-buffer-size :uint32)   ; DWORD
  (property-value-buffer :pointer)   ; EC_VARIANT* in/out
  (property-value-buffer-used :pointer))   ; DWORD* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。
use Win32::API;
my $EcGetSubscriptionProperty = Win32::API::More->new('WecApi',
    'BOOL EcGetSubscriptionProperty(LPARAM Subscription, int PropertyId, DWORD Flags, DWORD PropertyValueBufferSize, LPVOID PropertyValueBuffer, LPVOID PropertyValueBufferUsed)');
# my $ret = $EcGetSubscriptionProperty->Call($Subscription, $PropertyId, $Flags, $PropertyValueBufferSize, $PropertyValueBuffer, $PropertyValueBufferUsed);
# Subscription : INT_PTR -> LPARAM
# PropertyId : EC_SUBSCRIPTION_PROPERTY_ID -> int
# Flags : DWORD -> DWORD
# PropertyValueBufferSize : DWORD -> DWORD
# PropertyValueBuffer : EC_VARIANT* in/out -> LPVOID
# PropertyValueBufferUsed : DWORD* 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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