MFBeginCreateFile

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

HRESULT MFBeginCreateFile(
    MF_FILE_ACCESSMODE AccessMode,
    MF_FILE_OPENMODE OpenMode,
    MF_FILE_FLAGS fFlags,
    LPCWSTR pwszFilePath,
    IMFAsyncCallback* pCallback,
    IUnknown* pState,
    IUnknown** ppCancelCookie
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFBeginCreateFile(
    AccessMode As Integer,   ' MF_FILE_ACCESSMODE
    OpenMode As Integer,   ' MF_FILE_OPENMODE
    fFlags As Integer,   ' MF_FILE_FLAGS
    <MarshalAs(UnmanagedType.LPWStr)> pwszFilePath As String,   ' LPCWSTR
    pCallback As IntPtr,   ' IMFAsyncCallback*
    pState As IntPtr,   ' IUnknown*
    ppCancelCookie As IntPtr   ' IUnknown** out
) As Integer
End Function

' AccessMode : MF_FILE_ACCESSMODE
' OpenMode : MF_FILE_OPENMODE
' fFlags : MF_FILE_FLAGS
' pwszFilePath : LPCWSTR
' pCallback : IMFAsyncCallback*
' pState : IUnknown*
' ppCancelCookie : IUnknown** out
Declare PtrSafe Function MFBeginCreateFile Lib "mfplat" ( _
    ByVal AccessMode As Long, _
    ByVal OpenMode As Long, _
    ByVal fFlags As Long, _
    ByVal pwszFilePath As LongPtr, _
    ByVal pCallback As LongPtr, _
    ByVal pState As LongPtr, _
    ByVal ppCancelCookie 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

MFBeginCreateFile = ctypes.windll.mfplat.MFBeginCreateFile
MFBeginCreateFile.restype = ctypes.c_int
MFBeginCreateFile.argtypes = [
    ctypes.c_int,  # AccessMode : MF_FILE_ACCESSMODE
    ctypes.c_int,  # OpenMode : MF_FILE_OPENMODE
    ctypes.c_int,  # fFlags : MF_FILE_FLAGS
    wintypes.LPCWSTR,  # pwszFilePath : LPCWSTR
    ctypes.c_void_p,  # pCallback : IMFAsyncCallback*
    ctypes.c_void_p,  # pState : IUnknown*
    ctypes.c_void_p,  # ppCancelCookie : IUnknown** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFBeginCreateFile = Fiddle::Function.new(
  lib['MFBeginCreateFile'],
  [
    Fiddle::TYPE_INT,  # AccessMode : MF_FILE_ACCESSMODE
    Fiddle::TYPE_INT,  # OpenMode : MF_FILE_OPENMODE
    Fiddle::TYPE_INT,  # fFlags : MF_FILE_FLAGS
    Fiddle::TYPE_VOIDP,  # pwszFilePath : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pCallback : IMFAsyncCallback*
    Fiddle::TYPE_VOIDP,  # pState : IUnknown*
    Fiddle::TYPE_VOIDP,  # ppCancelCookie : IUnknown** out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFBeginCreateFile(int AccessMode, int OpenMode, int fFlags, [MarshalAs(UnmanagedType.LPWStr)] string pwszFilePath, IntPtr pCallback, IntPtr pState, IntPtr ppCancelCookie);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFBeginCreateFile' -Namespace Win32 -PassThru
# $api::MFBeginCreateFile(AccessMode, OpenMode, fFlags, pwszFilePath, pCallback, pState, ppCancelCookie)

#uselib "MFPlat.dll"
#func global MFBeginCreateFile "MFBeginCreateFile" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; MFBeginCreateFile AccessMode, OpenMode, fFlags, pwszFilePath, pCallback, pState, ppCancelCookie   ; 戻り値は stat
; AccessMode : MF_FILE_ACCESSMODE -> "sptr"
; OpenMode : MF_FILE_OPENMODE -> "sptr"
; fFlags : MF_FILE_FLAGS -> "sptr"
; pwszFilePath : LPCWSTR -> "sptr"
; pCallback : IMFAsyncCallback* -> "sptr"
; pState : IUnknown* -> "sptr"
; ppCancelCookie : IUnknown** 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 MFBeginCreateFile "MFBeginCreateFile" int, int, int, wstr, sptr, sptr, sptr
; res = MFBeginCreateFile(AccessMode, OpenMode, fFlags, pwszFilePath, pCallback, pState, ppCancelCookie)
; AccessMode : MF_FILE_ACCESSMODE -> "int"
; OpenMode : MF_FILE_OPENMODE -> "int"
; fFlags : MF_FILE_FLAGS -> "int"
; pwszFilePath : LPCWSTR -> "wstr"
; pCallback : IMFAsyncCallback* -> "sptr"
; pState : IUnknown* -> "sptr"
; ppCancelCookie : IUnknown** out -> "sptr"

; HRESULT MFBeginCreateFile(MF_FILE_ACCESSMODE AccessMode, MF_FILE_OPENMODE OpenMode, MF_FILE_FLAGS fFlags, LPCWSTR pwszFilePath, IMFAsyncCallback* pCallback, IUnknown* pState, IUnknown** ppCancelCookie)
#uselib "MFPlat.dll"
#cfunc global MFBeginCreateFile "MFBeginCreateFile" int, int, int, wstr, intptr, intptr, intptr
; res = MFBeginCreateFile(AccessMode, OpenMode, fFlags, pwszFilePath, pCallback, pState, ppCancelCookie)
; AccessMode : MF_FILE_ACCESSMODE -> "int"
; OpenMode : MF_FILE_OPENMODE -> "int"
; fFlags : MF_FILE_FLAGS -> "int"
; pwszFilePath : LPCWSTR -> "wstr"
; pCallback : IMFAsyncCallback* -> "intptr"
; pState : IUnknown* -> "intptr"
; ppCancelCookie : IUnknown** out -> "intptr"

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFBeginCreateFile = mfplat.NewProc("MFBeginCreateFile")
)

// AccessMode (MF_FILE_ACCESSMODE), OpenMode (MF_FILE_OPENMODE), fFlags (MF_FILE_FLAGS), pwszFilePath (LPCWSTR), pCallback (IMFAsyncCallback*), pState (IUnknown*), ppCancelCookie (IUnknown** out)
r1, _, err := procMFBeginCreateFile.Call(
	uintptr(AccessMode),
	uintptr(OpenMode),
	uintptr(fFlags),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pwszFilePath))),
	uintptr(pCallback),
	uintptr(pState),
	uintptr(ppCancelCookie),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFBeginCreateFile(
  AccessMode: Integer;   // MF_FILE_ACCESSMODE
  OpenMode: Integer;   // MF_FILE_OPENMODE
  fFlags: Integer;   // MF_FILE_FLAGS
  pwszFilePath: PWideChar;   // LPCWSTR
  pCallback: Pointer;   // IMFAsyncCallback*
  pState: Pointer;   // IUnknown*
  ppCancelCookie: Pointer   // IUnknown** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFBeginCreateFile';

result := DllCall("MFPlat\MFBeginCreateFile"
    , "Int", AccessMode   ; MF_FILE_ACCESSMODE
    , "Int", OpenMode   ; MF_FILE_OPENMODE
    , "Int", fFlags   ; MF_FILE_FLAGS
    , "WStr", pwszFilePath   ; LPCWSTR
    , "Ptr", pCallback   ; IMFAsyncCallback*
    , "Ptr", pState   ; IUnknown*
    , "Ptr", ppCancelCookie   ; IUnknown** out
    , "Int")   ; return: HRESULT

●MFBeginCreateFile(AccessMode, OpenMode, fFlags, pwszFilePath, pCallback, pState, ppCancelCookie) = DLL("MFPlat.dll", "int MFBeginCreateFile(int, int, int, char*, void*, void*, void*)")
# 呼び出し: MFBeginCreateFile(AccessMode, OpenMode, fFlags, pwszFilePath, pCallback, pState, ppCancelCookie)
# AccessMode : MF_FILE_ACCESSMODE -> "int"
# OpenMode : MF_FILE_OPENMODE -> "int"
# fFlags : MF_FILE_FLAGS -> "int"
# pwszFilePath : LPCWSTR -> "char*"
# pCallback : IMFAsyncCallback* -> "void*"
# pState : IUnknown* -> "void*"
# ppCancelCookie : IUnknown** 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)。