MFGetSystemId

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

HRESULT MFGetSystemId(
    IMFSystemId** ppId
);

<DllImport("MF.dll", ExactSpelling:=True)>
Public Shared Function MFGetSystemId(
    ppId As IntPtr   ' IMFSystemId** out
) As Integer
End Function

' ppId : IMFSystemId** out
Declare PtrSafe Function MFGetSystemId Lib "mf" ( _
    ByVal ppId 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

MFGetSystemId = ctypes.windll.mf.MFGetSystemId
MFGetSystemId.restype = ctypes.c_int
MFGetSystemId.argtypes = [
    ctypes.c_void_p,  # ppId : IMFSystemId** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MF.dll')
MFGetSystemId = Fiddle::Function.new(
  lib['MFGetSystemId'],
  [
    Fiddle::TYPE_VOIDP,  # ppId : IMFSystemId** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "mf")]
extern "system" {
    fn MFGetSystemId(
        ppId: *mut *mut core::ffi::c_void  // IMFSystemId** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MF.dll")]
public static extern int MFGetSystemId(IntPtr ppId);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MF_MFGetSystemId' -Namespace Win32 -PassThru
# $api::MFGetSystemId(ppId)

#uselib "MF.dll"
#func global MFGetSystemId "MFGetSystemId" sptr
; MFGetSystemId ppId   ; 戻り値は stat
; ppId : IMFSystemId** 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 MFGetSystemId "MFGetSystemId" sptr
; res = MFGetSystemId(ppId)
; ppId : IMFSystemId** out -> "sptr"

; HRESULT MFGetSystemId(IMFSystemId** ppId)
#uselib "MF.dll"
#cfunc global MFGetSystemId "MFGetSystemId" intptr
; res = MFGetSystemId(ppId)
; ppId : IMFSystemId** out -> "intptr"

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

var (
	mf = windows.NewLazySystemDLL("MF.dll")
	procMFGetSystemId = mf.NewProc("MFGetSystemId")
)

// ppId (IMFSystemId** out)
r1, _, err := procMFGetSystemId.Call(
	uintptr(ppId),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function MFGetSystemId(
  ppId: Pointer   // IMFSystemId** out
): Integer; stdcall;
  external 'MF.dll' name 'MFGetSystemId';

result := DllCall("MF\MFGetSystemId"
    , "Ptr", ppId   ; IMFSystemId** out
    , "Int")   ; return: HRESULT

●MFGetSystemId(ppId) = DLL("MF.dll", "int MFGetSystemId(void*)")
# 呼び出し: MFGetSystemId(ppId)
# ppId : IMFSystemId** 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)。