MFGetAttributesAsBlobSize

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

HRESULT MFGetAttributesAsBlobSize(
    IMFAttributes* pAttributes,
    DWORD* pcbBufSize
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFGetAttributesAsBlobSize(
    pAttributes As IntPtr,   ' IMFAttributes*
    <Out> ByRef pcbBufSize As UInteger   ' DWORD* out
) As Integer
End Function

' pAttributes : IMFAttributes*
' pcbBufSize : DWORD* out
Declare PtrSafe Function MFGetAttributesAsBlobSize Lib "mfplat" ( _
    ByVal pAttributes As LongPtr, _
    ByRef pcbBufSize 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

MFGetAttributesAsBlobSize = ctypes.windll.mfplat.MFGetAttributesAsBlobSize
MFGetAttributesAsBlobSize.restype = ctypes.c_int
MFGetAttributesAsBlobSize.argtypes = [
    ctypes.c_void_p,  # pAttributes : IMFAttributes*
    ctypes.POINTER(wintypes.DWORD),  # pcbBufSize : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFGetAttributesAsBlobSize = Fiddle::Function.new(
  lib['MFGetAttributesAsBlobSize'],
  [
    Fiddle::TYPE_VOIDP,  # pAttributes : IMFAttributes*
    Fiddle::TYPE_VOIDP,  # pcbBufSize : DWORD* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFGetAttributesAsBlobSize(
        pAttributes: *mut core::ffi::c_void,  // IMFAttributes*
        pcbBufSize: *mut u32  // DWORD* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFGetAttributesAsBlobSize(IntPtr pAttributes, out uint pcbBufSize);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFGetAttributesAsBlobSize' -Namespace Win32 -PassThru
# $api::MFGetAttributesAsBlobSize(pAttributes, pcbBufSize)

#uselib "MFPlat.dll"
#func global MFGetAttributesAsBlobSize "MFGetAttributesAsBlobSize" sptr, sptr
; MFGetAttributesAsBlobSize pAttributes, varptr(pcbBufSize)   ; 戻り値は stat
; pAttributes : IMFAttributes* -> "sptr"
; pcbBufSize : 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。

#uselib "MFPlat.dll"
#cfunc global MFGetAttributesAsBlobSize "MFGetAttributesAsBlobSize" sptr, var
; res = MFGetAttributesAsBlobSize(pAttributes, pcbBufSize)
; pAttributes : IMFAttributes* -> "sptr"
; pcbBufSize : 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。

; HRESULT MFGetAttributesAsBlobSize(IMFAttributes* pAttributes, DWORD* pcbBufSize)
#uselib "MFPlat.dll"
#cfunc global MFGetAttributesAsBlobSize "MFGetAttributesAsBlobSize" intptr, var
; res = MFGetAttributesAsBlobSize(pAttributes, pcbBufSize)
; pAttributes : IMFAttributes* -> "intptr"
; pcbBufSize : 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 (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFGetAttributesAsBlobSize = mfplat.NewProc("MFGetAttributesAsBlobSize")
)

// pAttributes (IMFAttributes*), pcbBufSize (DWORD* out)
r1, _, err := procMFGetAttributesAsBlobSize.Call(
	uintptr(pAttributes),
	uintptr(pcbBufSize),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFGetAttributesAsBlobSize(
  pAttributes: Pointer;   // IMFAttributes*
  pcbBufSize: Pointer   // DWORD* out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFGetAttributesAsBlobSize';

result := DllCall("MFPlat\MFGetAttributesAsBlobSize"
    , "Ptr", pAttributes   ; IMFAttributes*
    , "Ptr", pcbBufSize   ; DWORD* out
    , "Int")   ; return: HRESULT

●MFGetAttributesAsBlobSize(pAttributes, pcbBufSize) = DLL("MFPlat.dll", "int MFGetAttributesAsBlobSize(void*, void*)")
# 呼び出し: MFGetAttributesAsBlobSize(pAttributes, pcbBufSize)
# pAttributes : IMFAttributes* -> "void*"
# pcbBufSize : 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)。