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CoGetClassObjectFromURL

関数

URL上のコードからクラスオブジェクトを取得し必要に応じてダウンロードする。

DLLurlmon.dll呼出規約winapi

シグネチャ

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

HRESULT CoGetClassObjectFromURL(
    const GUID* rCLASSID,
    LPCWSTR szCODE,
    DWORD dwFileVersionMS,
    DWORD dwFileVersionLS,
    LPCWSTR szTYPE,
    IBindCtx* pBindCtx,
    CLSCTX dwClsContext,
    void* pvReserved,   // optional
    const GUID* riid,
    void** ppv
);

パラメーター

名前	型	方向	説明
rCLASSID	GUID*	in	取得するクラスのCLSIDへのポインタ。CLSID_NULL指定でMIME種別から解決する。
szCODE	LPCWSTR	in	ダウンロード元コードのURL文字列。NULL可。
dwFileVersionMS	DWORD	in	要求するファイルバージョンの上位32ビット。
dwFileVersionLS	DWORD	in	要求するファイルバージョンの下位32ビット。
szTYPE	LPCWSTR	in	MIMEタイプ文字列。CLSID未指定時の解決に使う。NULL可。
pBindCtx	IBindCtx*	in	ダウンロードに使用するバインドコンテキスト(IBindCtx)へのポインタ。
dwClsContext	CLSCTX	in	実行コンテキストを指定するCLSCTX値。
pvReserved	void*	optional	予約パラメータ。NULLを指定する。
riid	GUID*	in	取得するインターフェイスのIID(GUID)へのポインタ。
ppv	void**	out	取得したインターフェイスポインタを受け取る出力ポインタ。

戻り値の型: HRESULT

各言語での呼び出し定義

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

HRESULT CoGetClassObjectFromURL(
    const GUID* rCLASSID,
    LPCWSTR szCODE,
    DWORD dwFileVersionMS,
    DWORD dwFileVersionLS,
    LPCWSTR szTYPE,
    IBindCtx* pBindCtx,
    CLSCTX dwClsContext,
    void* pvReserved,   // optional
    const GUID* riid,
    void** ppv
);

[DllImport("urlmon.dll", ExactSpelling = true)]
static extern int CoGetClassObjectFromURL(
    ref Guid rCLASSID,   // GUID*
    [MarshalAs(UnmanagedType.LPWStr)] string szCODE,   // LPCWSTR
    uint dwFileVersionMS,   // DWORD
    uint dwFileVersionLS,   // DWORD
    [MarshalAs(UnmanagedType.LPWStr)] string szTYPE,   // LPCWSTR
    IntPtr pBindCtx,   // IBindCtx*
    uint dwClsContext,   // CLSCTX
    IntPtr pvReserved,   // void* optional
    ref Guid riid,   // GUID*
    IntPtr ppv   // void** out
);

<DllImport("urlmon.dll", ExactSpelling:=True)>
Public Shared Function CoGetClassObjectFromURL(
    ByRef rCLASSID As Guid,   ' GUID*
    <MarshalAs(UnmanagedType.LPWStr)> szCODE As String,   ' LPCWSTR
    dwFileVersionMS As UInteger,   ' DWORD
    dwFileVersionLS As UInteger,   ' DWORD
    <MarshalAs(UnmanagedType.LPWStr)> szTYPE As String,   ' LPCWSTR
    pBindCtx As IntPtr,   ' IBindCtx*
    dwClsContext As UInteger,   ' CLSCTX
    pvReserved As IntPtr,   ' void* optional
    ByRef riid As Guid,   ' GUID*
    ppv As IntPtr   ' void** out
) As Integer
End Function

' rCLASSID : GUID*
' szCODE : LPCWSTR
' dwFileVersionMS : DWORD
' dwFileVersionLS : DWORD
' szTYPE : LPCWSTR
' pBindCtx : IBindCtx*
' dwClsContext : CLSCTX
' pvReserved : void* optional
' riid : GUID*
' ppv : void** out
Declare PtrSafe Function CoGetClassObjectFromURL Lib "urlmon" ( _
    ByVal rCLASSID As LongPtr, _
    ByVal szCODE As LongPtr, _
    ByVal dwFileVersionMS As Long, _
    ByVal dwFileVersionLS As Long, _
    ByVal szTYPE As LongPtr, _
    ByVal pBindCtx As LongPtr, _
    ByVal dwClsContext As Long, _
    ByVal pvReserved As LongPtr, _
    ByVal riid As LongPtr, _
    ByVal ppv 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

CoGetClassObjectFromURL = ctypes.windll.urlmon.CoGetClassObjectFromURL
CoGetClassObjectFromURL.restype = ctypes.c_int
CoGetClassObjectFromURL.argtypes = [
    ctypes.c_void_p,  # rCLASSID : GUID*
    wintypes.LPCWSTR,  # szCODE : LPCWSTR
    wintypes.DWORD,  # dwFileVersionMS : DWORD
    wintypes.DWORD,  # dwFileVersionLS : DWORD
    wintypes.LPCWSTR,  # szTYPE : LPCWSTR
    ctypes.c_void_p,  # pBindCtx : IBindCtx*
    wintypes.DWORD,  # dwClsContext : CLSCTX
    ctypes.POINTER(None),  # pvReserved : void* optional
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppv : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('urlmon.dll')
CoGetClassObjectFromURL = Fiddle::Function.new(
  lib['CoGetClassObjectFromURL'],
  [
    Fiddle::TYPE_VOIDP,  # rCLASSID : GUID*
    Fiddle::TYPE_VOIDP,  # szCODE : LPCWSTR
    -Fiddle::TYPE_INT,  # dwFileVersionMS : DWORD
    -Fiddle::TYPE_INT,  # dwFileVersionLS : DWORD
    Fiddle::TYPE_VOIDP,  # szTYPE : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pBindCtx : IBindCtx*
    -Fiddle::TYPE_INT,  # dwClsContext : CLSCTX
    Fiddle::TYPE_VOIDP,  # pvReserved : void* optional
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppv : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "urlmon")]
extern "system" {
    fn CoGetClassObjectFromURL(
        rCLASSID: *const GUID,  // GUID*
        szCODE: *const u16,  // LPCWSTR
        dwFileVersionMS: u32,  // DWORD
        dwFileVersionLS: u32,  // DWORD
        szTYPE: *const u16,  // LPCWSTR
        pBindCtx: *mut core::ffi::c_void,  // IBindCtx*
        dwClsContext: u32,  // CLSCTX
        pvReserved: *mut (),  // void* optional
        riid: *const GUID,  // GUID*
        ppv: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("urlmon.dll")]
public static extern int CoGetClassObjectFromURL(ref Guid rCLASSID, [MarshalAs(UnmanagedType.LPWStr)] string szCODE, uint dwFileVersionMS, uint dwFileVersionLS, [MarshalAs(UnmanagedType.LPWStr)] string szTYPE, IntPtr pBindCtx, uint dwClsContext, IntPtr pvReserved, ref Guid riid, IntPtr ppv);
"@
$api = Add-Type -MemberDefinition $sig -Name 'urlmon_CoGetClassObjectFromURL' -Namespace Win32 -PassThru
# $api::CoGetClassObjectFromURL(rCLASSID, szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, riid, ppv)

#uselib "urlmon.dll"
#func global CoGetClassObjectFromURL "CoGetClassObjectFromURL" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; CoGetClassObjectFromURL varptr(rCLASSID), szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, varptr(riid), ppv   ; 戻り値は stat
; rCLASSID : GUID* -> "sptr"
; szCODE : LPCWSTR -> "sptr"
; dwFileVersionMS : DWORD -> "sptr"
; dwFileVersionLS : DWORD -> "sptr"
; szTYPE : LPCWSTR -> "sptr"
; pBindCtx : IBindCtx* -> "sptr"
; dwClsContext : CLSCTX -> "sptr"
; pvReserved : void* optional -> "sptr"
; riid : GUID* -> "sptr"
; ppv : void** 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 "urlmon.dll"
#cfunc global CoGetClassObjectFromURL "CoGetClassObjectFromURL" var, wstr, int, int, wstr, sptr, int, sptr, var, sptr
; res = CoGetClassObjectFromURL(rCLASSID, szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, riid, ppv)
; rCLASSID : GUID* -> "var"
; szCODE : LPCWSTR -> "wstr"
; dwFileVersionMS : DWORD -> "int"
; dwFileVersionLS : DWORD -> "int"
; szTYPE : LPCWSTR -> "wstr"
; pBindCtx : IBindCtx* -> "sptr"
; dwClsContext : CLSCTX -> "int"
; pvReserved : void* optional -> "sptr"
; riid : GUID* -> "var"
; ppv : void** out -> "sptr"
; ※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 "urlmon.dll"
#cfunc global CoGetClassObjectFromURL "CoGetClassObjectFromURL" sptr, wstr, int, int, wstr, sptr, int, sptr, sptr, sptr
; res = CoGetClassObjectFromURL(varptr(rCLASSID), szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, varptr(riid), ppv)
; rCLASSID : GUID* -> "sptr"
; szCODE : LPCWSTR -> "wstr"
; dwFileVersionMS : DWORD -> "int"
; dwFileVersionLS : DWORD -> "int"
; szTYPE : LPCWSTR -> "wstr"
; pBindCtx : IBindCtx* -> "sptr"
; dwClsContext : CLSCTX -> "int"
; pvReserved : void* optional -> "sptr"
; riid : GUID* -> "sptr"
; ppv : void** 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 CoGetClassObjectFromURL(GUID* rCLASSID, LPCWSTR szCODE, DWORD dwFileVersionMS, DWORD dwFileVersionLS, LPCWSTR szTYPE, IBindCtx* pBindCtx, CLSCTX dwClsContext, void* pvReserved, GUID* riid, void** ppv)
#uselib "urlmon.dll"
#cfunc global CoGetClassObjectFromURL "CoGetClassObjectFromURL" var, wstr, int, int, wstr, intptr, int, intptr, var, intptr
; res = CoGetClassObjectFromURL(rCLASSID, szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, riid, ppv)
; rCLASSID : GUID* -> "var"
; szCODE : LPCWSTR -> "wstr"
; dwFileVersionMS : DWORD -> "int"
; dwFileVersionLS : DWORD -> "int"
; szTYPE : LPCWSTR -> "wstr"
; pBindCtx : IBindCtx* -> "intptr"
; dwClsContext : CLSCTX -> "int"
; pvReserved : void* optional -> "intptr"
; riid : GUID* -> "var"
; ppv : void** out -> "intptr"
; ※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 CoGetClassObjectFromURL(GUID* rCLASSID, LPCWSTR szCODE, DWORD dwFileVersionMS, DWORD dwFileVersionLS, LPCWSTR szTYPE, IBindCtx* pBindCtx, CLSCTX dwClsContext, void* pvReserved, GUID* riid, void** ppv)
#uselib "urlmon.dll"
#cfunc global CoGetClassObjectFromURL "CoGetClassObjectFromURL" intptr, wstr, int, int, wstr, intptr, int, intptr, intptr, intptr
; res = CoGetClassObjectFromURL(varptr(rCLASSID), szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, varptr(riid), ppv)
; rCLASSID : GUID* -> "intptr"
; szCODE : LPCWSTR -> "wstr"
; dwFileVersionMS : DWORD -> "int"
; dwFileVersionLS : DWORD -> "int"
; szTYPE : LPCWSTR -> "wstr"
; pBindCtx : IBindCtx* -> "intptr"
; dwClsContext : CLSCTX -> "int"
; pvReserved : void* optional -> "intptr"
; riid : GUID* -> "intptr"
; ppv : void** 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 (
	urlmon = windows.NewLazySystemDLL("urlmon.dll")
	procCoGetClassObjectFromURL = urlmon.NewProc("CoGetClassObjectFromURL")
)

// rCLASSID (GUID*), szCODE (LPCWSTR), dwFileVersionMS (DWORD), dwFileVersionLS (DWORD), szTYPE (LPCWSTR), pBindCtx (IBindCtx*), dwClsContext (CLSCTX), pvReserved (void* optional), riid (GUID*), ppv (void** out)
r1, _, err := procCoGetClassObjectFromURL.Call(
	uintptr(rCLASSID),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szCODE))),
	uintptr(dwFileVersionMS),
	uintptr(dwFileVersionLS),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szTYPE))),
	uintptr(pBindCtx),
	uintptr(dwClsContext),
	uintptr(pvReserved),
	uintptr(riid),
	uintptr(ppv),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoGetClassObjectFromURL(
  rCLASSID: PGUID;   // GUID*
  szCODE: PWideChar;   // LPCWSTR
  dwFileVersionMS: DWORD;   // DWORD
  dwFileVersionLS: DWORD;   // DWORD
  szTYPE: PWideChar;   // LPCWSTR
  pBindCtx: Pointer;   // IBindCtx*
  dwClsContext: DWORD;   // CLSCTX
  pvReserved: Pointer;   // void* optional
  riid: PGUID;   // GUID*
  ppv: Pointer   // void** out
): Integer; stdcall;
  external 'urlmon.dll' name 'CoGetClassObjectFromURL';

result := DllCall("urlmon\CoGetClassObjectFromURL"
    , "Ptr", rCLASSID   ; GUID*
    , "WStr", szCODE   ; LPCWSTR
    , "UInt", dwFileVersionMS   ; DWORD
    , "UInt", dwFileVersionLS   ; DWORD
    , "WStr", szTYPE   ; LPCWSTR
    , "Ptr", pBindCtx   ; IBindCtx*
    , "UInt", dwClsContext   ; CLSCTX
    , "Ptr", pvReserved   ; void* optional
    , "Ptr", riid   ; GUID*
    , "Ptr", ppv   ; void** out
    , "Int")   ; return: HRESULT

●CoGetClassObjectFromURL(rCLASSID, szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, riid, ppv) = DLL("urlmon.dll", "int CoGetClassObjectFromURL(void*, char*, dword, dword, char*, void*, dword, void*, void*, void*)")
# 呼び出し: CoGetClassObjectFromURL(rCLASSID, szCODE, dwFileVersionMS, dwFileVersionLS, szTYPE, pBindCtx, dwClsContext, pvReserved, riid, ppv)
# rCLASSID : GUID* -> "void*"
# szCODE : LPCWSTR -> "char*"
# dwFileVersionMS : DWORD -> "dword"
# dwFileVersionLS : DWORD -> "dword"
# szTYPE : LPCWSTR -> "char*"
# pBindCtx : IBindCtx* -> "void*"
# dwClsContext : CLSCTX -> "dword"
# pvReserved : void* optional -> "void*"
# riid : GUID* -> "void*"
# ppv : void** 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)。