MFCreateFile

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

HRESULT MFCreateFile(
    MF_FILE_ACCESSMODE AccessMode,
    MF_FILE_OPENMODE OpenMode,
    MF_FILE_FLAGS fFlags,
    LPCWSTR pwszFileURL,
    IMFByteStream** ppIByteStream
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFCreateFile(
    AccessMode As Integer,   ' MF_FILE_ACCESSMODE
    OpenMode As Integer,   ' MF_FILE_OPENMODE
    fFlags As Integer,   ' MF_FILE_FLAGS
    <MarshalAs(UnmanagedType.LPWStr)> pwszFileURL As String,   ' LPCWSTR
    ppIByteStream As IntPtr   ' IMFByteStream** out
) As Integer
End Function

' AccessMode : MF_FILE_ACCESSMODE
' OpenMode : MF_FILE_OPENMODE
' fFlags : MF_FILE_FLAGS
' pwszFileURL : LPCWSTR
' ppIByteStream : IMFByteStream** out
Declare PtrSafe Function MFCreateFile Lib "mfplat" ( _
    ByVal AccessMode As Long, _
    ByVal OpenMode As Long, _
    ByVal fFlags As Long, _
    ByVal pwszFileURL As LongPtr, _
    ByVal ppIByteStream 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

MFCreateFile = ctypes.windll.mfplat.MFCreateFile
MFCreateFile.restype = ctypes.c_int
MFCreateFile.argtypes = [
    ctypes.c_int,  # AccessMode : MF_FILE_ACCESSMODE
    ctypes.c_int,  # OpenMode : MF_FILE_OPENMODE
    ctypes.c_int,  # fFlags : MF_FILE_FLAGS
    wintypes.LPCWSTR,  # pwszFileURL : LPCWSTR
    ctypes.c_void_p,  # ppIByteStream : IMFByteStream** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFCreateFile = Fiddle::Function.new(
  lib['MFCreateFile'],
  [
    Fiddle::TYPE_INT,  # AccessMode : MF_FILE_ACCESSMODE
    Fiddle::TYPE_INT,  # OpenMode : MF_FILE_OPENMODE
    Fiddle::TYPE_INT,  # fFlags : MF_FILE_FLAGS
    Fiddle::TYPE_VOIDP,  # pwszFileURL : LPCWSTR
    Fiddle::TYPE_VOIDP,  # ppIByteStream : IMFByteStream** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFCreateFile(
        AccessMode: i32,  // MF_FILE_ACCESSMODE
        OpenMode: i32,  // MF_FILE_OPENMODE
        fFlags: i32,  // MF_FILE_FLAGS
        pwszFileURL: *const u16,  // LPCWSTR
        ppIByteStream: *mut *mut core::ffi::c_void  // IMFByteStream** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFCreateFile(int AccessMode, int OpenMode, int fFlags, [MarshalAs(UnmanagedType.LPWStr)] string pwszFileURL, IntPtr ppIByteStream);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFCreateFile' -Namespace Win32 -PassThru
# $api::MFCreateFile(AccessMode, OpenMode, fFlags, pwszFileURL, ppIByteStream)

#uselib "MFPlat.dll"
#func global MFCreateFile "MFCreateFile" sptr, sptr, sptr, sptr, sptr
; MFCreateFile AccessMode, OpenMode, fFlags, pwszFileURL, ppIByteStream   ; 戻り値は stat
; AccessMode : MF_FILE_ACCESSMODE -> "sptr"
; OpenMode : MF_FILE_OPENMODE -> "sptr"
; fFlags : MF_FILE_FLAGS -> "sptr"
; pwszFileURL : LPCWSTR -> "sptr"
; ppIByteStream : IMFByteStream** 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。

#uselib "MFPlat.dll"
#cfunc global MFCreateFile "MFCreateFile" int, int, int, wstr, sptr
; res = MFCreateFile(AccessMode, OpenMode, fFlags, pwszFileURL, ppIByteStream)
; AccessMode : MF_FILE_ACCESSMODE -> "int"
; OpenMode : MF_FILE_OPENMODE -> "int"
; fFlags : MF_FILE_FLAGS -> "int"
; pwszFileURL : LPCWSTR -> "wstr"
; ppIByteStream : IMFByteStream** out -> "sptr"

; HRESULT MFCreateFile(MF_FILE_ACCESSMODE AccessMode, MF_FILE_OPENMODE OpenMode, MF_FILE_FLAGS fFlags, LPCWSTR pwszFileURL, IMFByteStream** ppIByteStream)
#uselib "MFPlat.dll"
#cfunc global MFCreateFile "MFCreateFile" int, int, int, wstr, intptr
; res = MFCreateFile(AccessMode, OpenMode, fFlags, pwszFileURL, ppIByteStream)
; AccessMode : MF_FILE_ACCESSMODE -> "int"
; OpenMode : MF_FILE_OPENMODE -> "int"
; fFlags : MF_FILE_FLAGS -> "int"
; pwszFileURL : LPCWSTR -> "wstr"
; ppIByteStream : IMFByteStream** out -> "intptr"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFCreateFile = mfplat.NewProc("MFCreateFile")
)

// AccessMode (MF_FILE_ACCESSMODE), OpenMode (MF_FILE_OPENMODE), fFlags (MF_FILE_FLAGS), pwszFileURL (LPCWSTR), ppIByteStream (IMFByteStream** out)
r1, _, err := procMFCreateFile.Call(
	uintptr(AccessMode),
	uintptr(OpenMode),
	uintptr(fFlags),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszFileURL))),
	uintptr(ppIByteStream),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateFile(
  AccessMode: Integer;   // MF_FILE_ACCESSMODE
  OpenMode: Integer;   // MF_FILE_OPENMODE
  fFlags: Integer;   // MF_FILE_FLAGS
  pwszFileURL: PWideChar;   // LPCWSTR
  ppIByteStream: Pointer   // IMFByteStream** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCreateFile';

result := DllCall("MFPlat\MFCreateFile"
    , "Int", AccessMode   ; MF_FILE_ACCESSMODE
    , "Int", OpenMode   ; MF_FILE_OPENMODE
    , "Int", fFlags   ; MF_FILE_FLAGS
    , "WStr", pwszFileURL   ; LPCWSTR
    , "Ptr", ppIByteStream   ; IMFByteStream** out
    , "Int")   ; return: HRESULT

●MFCreateFile(AccessMode, OpenMode, fFlags, pwszFileURL, ppIByteStream) = DLL("MFPlat.dll", "int MFCreateFile(int, int, int, char*, void*)")
# 呼び出し: MFCreateFile(AccessMode, OpenMode, fFlags, pwszFileURL, ppIByteStream)
# AccessMode : MF_FILE_ACCESSMODE -> "int"
# OpenMode : MF_FILE_OPENMODE -> "int"
# fFlags : MF_FILE_FLAGS -> "int"
# pwszFileURL : LPCWSTR -> "char*"
# ppIByteStream : IMFByteStream** 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)。