MFCreateMediaExtensionActivate

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

HRESULT MFCreateMediaExtensionActivate(
    LPCWSTR szActivatableClassId,
    IUnknown* pConfiguration,   // optional
    const GUID* riid,
    void** ppvObject
);

<DllImport("MFPlat.dll", ExactSpelling:=True)>
Public Shared Function MFCreateMediaExtensionActivate(
    <MarshalAs(UnmanagedType.LPWStr)> szActivatableClassId As String,   ' LPCWSTR
    pConfiguration As IntPtr,   ' IUnknown* optional
    ByRef riid As Guid,   ' GUID*
    ppvObject As IntPtr   ' void** out
) As Integer
End Function

' szActivatableClassId : LPCWSTR
' pConfiguration : IUnknown* optional
' riid : GUID*
' ppvObject : void** out
Declare PtrSafe Function MFCreateMediaExtensionActivate Lib "mfplat" ( _
    ByVal szActivatableClassId As LongPtr, _
    ByVal pConfiguration As LongPtr, _
    ByVal riid As LongPtr, _
    ByVal ppvObject 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

MFCreateMediaExtensionActivate = ctypes.windll.mfplat.MFCreateMediaExtensionActivate
MFCreateMediaExtensionActivate.restype = ctypes.c_int
MFCreateMediaExtensionActivate.argtypes = [
    wintypes.LPCWSTR,  # szActivatableClassId : LPCWSTR
    ctypes.c_void_p,  # pConfiguration : IUnknown* optional
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppvObject : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MFPlat.dll')
MFCreateMediaExtensionActivate = Fiddle::Function.new(
  lib['MFCreateMediaExtensionActivate'],
  [
    Fiddle::TYPE_VOIDP,  # szActivatableClassId : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pConfiguration : IUnknown* optional
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppvObject : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mfplat")]
extern "system" {
    fn MFCreateMediaExtensionActivate(
        szActivatableClassId: *const u16,  // LPCWSTR
        pConfiguration: *mut core::ffi::c_void,  // IUnknown* optional
        riid: *const GUID,  // GUID*
        ppvObject: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MFPlat.dll")]
public static extern int MFCreateMediaExtensionActivate([MarshalAs(UnmanagedType.LPWStr)] string szActivatableClassId, IntPtr pConfiguration, ref Guid riid, IntPtr ppvObject);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MFPlat_MFCreateMediaExtensionActivate' -Namespace Win32 -PassThru
# $api::MFCreateMediaExtensionActivate(szActivatableClassId, pConfiguration, riid, ppvObject)

#uselib "MFPlat.dll"
#func global MFCreateMediaExtensionActivate "MFCreateMediaExtensionActivate" sptr, sptr, sptr, sptr
; MFCreateMediaExtensionActivate szActivatableClassId, pConfiguration, varptr(riid), ppvObject   ; 戻り値は stat
; szActivatableClassId : LPCWSTR -> "sptr"
; pConfiguration : IUnknown* optional -> "sptr"
; riid : GUID* -> "sptr"
; ppvObject : 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。

#uselib "MFPlat.dll"
#cfunc global MFCreateMediaExtensionActivate "MFCreateMediaExtensionActivate" wstr, sptr, var, sptr
; res = MFCreateMediaExtensionActivate(szActivatableClassId, pConfiguration, riid, ppvObject)
; szActivatableClassId : LPCWSTR -> "wstr"
; pConfiguration : IUnknown* optional -> "sptr"
; riid : GUID* -> "var"
; ppvObject : 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。

; HRESULT MFCreateMediaExtensionActivate(LPCWSTR szActivatableClassId, IUnknown* pConfiguration, GUID* riid, void** ppvObject)
#uselib "MFPlat.dll"
#cfunc global MFCreateMediaExtensionActivate "MFCreateMediaExtensionActivate" wstr, intptr, var, intptr
; res = MFCreateMediaExtensionActivate(szActivatableClassId, pConfiguration, riid, ppvObject)
; szActivatableClassId : LPCWSTR -> "wstr"
; pConfiguration : IUnknown* optional -> "intptr"
; riid : GUID* -> "var"
; ppvObject : 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。

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

var (
	mfplat = windows.NewLazySystemDLL("MFPlat.dll")
	procMFCreateMediaExtensionActivate = mfplat.NewProc("MFCreateMediaExtensionActivate")
)

// szActivatableClassId (LPCWSTR), pConfiguration (IUnknown* optional), riid (GUID*), ppvObject (void** out)
r1, _, err := procMFCreateMediaExtensionActivate.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(szActivatableClassId))),
	uintptr(pConfiguration),
	uintptr(riid),
	uintptr(ppvObject),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFCreateMediaExtensionActivate(
  szActivatableClassId: PWideChar;   // LPCWSTR
  pConfiguration: Pointer;   // IUnknown* optional
  riid: PGUID;   // GUID*
  ppvObject: Pointer   // void** out
): Integer; stdcall;
  external 'MFPlat.dll' name 'MFCreateMediaExtensionActivate';

result := DllCall("MFPlat\MFCreateMediaExtensionActivate"
    , "WStr", szActivatableClassId   ; LPCWSTR
    , "Ptr", pConfiguration   ; IUnknown* optional
    , "Ptr", riid   ; GUID*
    , "Ptr", ppvObject   ; void** out
    , "Int")   ; return: HRESULT

●MFCreateMediaExtensionActivate(szActivatableClassId, pConfiguration, riid, ppvObject) = DLL("MFPlat.dll", "int MFCreateMediaExtensionActivate(char*, void*, void*, void*)")
# 呼び出し: MFCreateMediaExtensionActivate(szActivatableClassId, pConfiguration, riid, ppvObject)
# szActivatableClassId : LPCWSTR -> "char*"
# pConfiguration : IUnknown* optional -> "void*"
# riid : GUID* -> "void*"
# ppvObject : 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)。