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ReadClassStm

関数

ストリームに保存されたクラスIDを読み取る。

DLLOLE32.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

// OLE32.dll
#include <windows.h>

HRESULT ReadClassStm(
    IStream* pStm,
    GUID* pclsid
);

パラメーター

名前	型	方向
pStm	IStream*	in
pclsid	GUID*	out

戻り値の型: HRESULT

各言語での呼び出し定義

// OLE32.dll
#include <windows.h>

HRESULT ReadClassStm(
    IStream* pStm,
    GUID* pclsid
);

[DllImport("OLE32.dll", ExactSpelling = true)]
static extern int ReadClassStm(
    IntPtr pStm,   // IStream*
    out Guid pclsid   // GUID* out
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function ReadClassStm(
    pStm As IntPtr,   ' IStream*
    <Out> ByRef pclsid As Guid   ' GUID* out
) As Integer
End Function

' pStm : IStream*
' pclsid : GUID* out
Declare PtrSafe Function ReadClassStm Lib "ole32" ( _
    ByVal pStm As LongPtr, _
    ByVal pclsid 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

ReadClassStm = ctypes.windll.ole32.ReadClassStm
ReadClassStm.restype = ctypes.c_int
ReadClassStm.argtypes = [
    ctypes.c_void_p,  # pStm : IStream*
    ctypes.c_void_p,  # pclsid : GUID* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
ReadClassStm = Fiddle::Function.new(
  lib['ReadClassStm'],
  [
    Fiddle::TYPE_VOIDP,  # pStm : IStream*
    Fiddle::TYPE_VOIDP,  # pclsid : GUID* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn ReadClassStm(
        pStm: *mut core::ffi::c_void,  // IStream*
        pclsid: *mut GUID  // GUID* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int ReadClassStm(IntPtr pStm, out Guid pclsid);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_ReadClassStm' -Namespace Win32 -PassThru
# $api::ReadClassStm(pStm, pclsid)

#uselib "OLE32.dll"
#func global ReadClassStm "ReadClassStm" sptr, sptr
; ReadClassStm pStm, varptr(pclsid)   ; 戻り値は stat
; pStm : IStream* -> "sptr"
; pclsid : GUID* 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 "OLE32.dll"
#cfunc global ReadClassStm "ReadClassStm" sptr, var
; res = ReadClassStm(pStm, pclsid)
; pStm : IStream* -> "sptr"
; pclsid : GUID* 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。#uselib "OLE32.dll"
#cfunc global ReadClassStm "ReadClassStm" sptr, sptr
; res = ReadClassStm(pStm, varptr(pclsid))
; pStm : IStream* -> "sptr"
; pclsid : GUID* out -> "sptr"
; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。

出力引数:

; HRESULT ReadClassStm(IStream* pStm, GUID* pclsid)
#uselib "OLE32.dll"
#cfunc global ReadClassStm "ReadClassStm" intptr, var
; res = ReadClassStm(pStm, pclsid)
; pStm : IStream* -> "intptr"
; pclsid : GUID* 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。; HRESULT ReadClassStm(IStream* pStm, GUID* pclsid)
#uselib "OLE32.dll"
#cfunc global ReadClassStm "ReadClassStm" intptr, intptr
; res = ReadClassStm(pStm, varptr(pclsid))
; pStm : IStream* -> "intptr"
; pclsid : GUID* out -> "intptr"
; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procReadClassStm = ole32.NewProc("ReadClassStm")
)

// pStm (IStream*), pclsid (GUID* out)
r1, _, err := procReadClassStm.Call(
	uintptr(pStm),
	uintptr(pclsid),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function ReadClassStm(
  pStm: Pointer;   // IStream*
  pclsid: PGUID   // GUID* out
): Integer; stdcall;
  external 'OLE32.dll' name 'ReadClassStm';

result := DllCall("OLE32\ReadClassStm"
    , "Ptr", pStm   ; IStream*
    , "Ptr", pclsid   ; GUID* out
    , "Int")   ; return: HRESULT

●ReadClassStm(pStm, pclsid) = DLL("OLE32.dll", "int ReadClassStm(void*, void*)")
# 呼び出し: ReadClassStm(pStm, pclsid)
# pStm : IStream* -> "void*"
# pclsid : GUID* 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)。