MFGetService

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

HRESULT MFGetService(
    IUnknown* punkObject,
    const GUID* guidService,
    const GUID* riid,
    void** ppvObject
);

<DllImport("MF.dll", ExactSpelling:=True)>
Public Shared Function MFGetService(
    punkObject As IntPtr,   ' IUnknown*
    ByRef guidService As Guid,   ' GUID*
    ByRef riid As Guid,   ' GUID*
    ppvObject As IntPtr   ' void** out
) As Integer
End Function

' punkObject : IUnknown*
' guidService : GUID*
' riid : GUID*
' ppvObject : void** out
Declare PtrSafe Function MFGetService Lib "mf" ( _
    ByVal punkObject As LongPtr, _
    ByVal guidService 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

MFGetService = ctypes.windll.mf.MFGetService
MFGetService.restype = ctypes.c_int
MFGetService.argtypes = [
    ctypes.c_void_p,  # punkObject : IUnknown*
    ctypes.c_void_p,  # guidService : GUID*
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # ppvObject : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MF.dll')
MFGetService = Fiddle::Function.new(
  lib['MFGetService'],
  [
    Fiddle::TYPE_VOIDP,  # punkObject : IUnknown*
    Fiddle::TYPE_VOIDP,  # guidService : GUID*
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # ppvObject : void** out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("MF.dll")]
public static extern int MFGetService(IntPtr punkObject, ref Guid guidService, ref Guid riid, IntPtr ppvObject);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MF_MFGetService' -Namespace Win32 -PassThru
# $api::MFGetService(punkObject, guidService, riid, ppvObject)

#uselib "MF.dll"
#func global MFGetService "MFGetService" sptr, sptr, sptr, sptr
; MFGetService punkObject, varptr(guidService), varptr(riid), ppvObject   ; 戻り値は stat
; punkObject : IUnknown* -> "sptr"
; guidService : GUID* -> "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 "MF.dll"
#cfunc global MFGetService "MFGetService" sptr, var, var, sptr
; res = MFGetService(punkObject, guidService, riid, ppvObject)
; punkObject : IUnknown* -> "sptr"
; guidService : GUID* -> "var"
; 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 MFGetService(IUnknown* punkObject, GUID* guidService, GUID* riid, void** ppvObject)
#uselib "MF.dll"
#cfunc global MFGetService "MFGetService" intptr, var, var, intptr
; res = MFGetService(punkObject, guidService, riid, ppvObject)
; punkObject : IUnknown* -> "intptr"
; guidService : GUID* -> "var"
; 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 (
	mf = windows.NewLazySystemDLL("MF.dll")
	procMFGetService = mf.NewProc("MFGetService")
)

// punkObject (IUnknown*), guidService (GUID*), riid (GUID*), ppvObject (void** out)
r1, _, err := procMFGetService.Call(
	uintptr(punkObject),
	uintptr(guidService),
	uintptr(riid),
	uintptr(ppvObject),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFGetService(
  punkObject: Pointer;   // IUnknown*
  guidService: PGUID;   // GUID*
  riid: PGUID;   // GUID*
  ppvObject: Pointer   // void** out
): Integer; stdcall;
  external 'MF.dll' name 'MFGetService';

result := DllCall("MF\MFGetService"
    , "Ptr", punkObject   ; IUnknown*
    , "Ptr", guidService   ; GUID*
    , "Ptr", riid   ; GUID*
    , "Ptr", ppvObject   ; void** out
    , "Int")   ; return: HRESULT

●MFGetService(punkObject, guidService, riid, ppvObject) = DLL("MF.dll", "int MFGetService(void*, void*, void*, void*)")
# 呼び出し: MFGetService(punkObject, guidService, riid, ppvObject)
# punkObject : IUnknown* -> "void*"
# guidService : GUID* -> "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)。