CoGetStdMarshalEx

// OLE32.dll
#include <windows.h>

HRESULT CoGetStdMarshalEx(
    IUnknown* pUnkOuter,
    DWORD smexflags,
    IUnknown** ppUnkInner
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function CoGetStdMarshalEx(
    pUnkOuter As IntPtr,   ' IUnknown*
    smexflags As UInteger,   ' DWORD
    ppUnkInner As IntPtr   ' IUnknown** out
) As Integer
End Function

' pUnkOuter : IUnknown*
' smexflags : DWORD
' ppUnkInner : IUnknown** out
Declare PtrSafe Function CoGetStdMarshalEx Lib "ole32" ( _
    ByVal pUnkOuter As LongPtr, _
    ByVal smexflags As Long, _
    ByVal ppUnkInner 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

CoGetStdMarshalEx = ctypes.windll.ole32.CoGetStdMarshalEx
CoGetStdMarshalEx.restype = ctypes.c_int
CoGetStdMarshalEx.argtypes = [
    ctypes.c_void_p,  # pUnkOuter : IUnknown*
    wintypes.DWORD,  # smexflags : DWORD
    ctypes.c_void_p,  # ppUnkInner : IUnknown** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
CoGetStdMarshalEx = Fiddle::Function.new(
  lib['CoGetStdMarshalEx'],
  [
    Fiddle::TYPE_VOIDP,  # pUnkOuter : IUnknown*
    -Fiddle::TYPE_INT,  # smexflags : DWORD
    Fiddle::TYPE_VOIDP,  # ppUnkInner : IUnknown** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn CoGetStdMarshalEx(
        pUnkOuter: *mut core::ffi::c_void,  // IUnknown*
        smexflags: u32,  // DWORD
        ppUnkInner: *mut *mut core::ffi::c_void  // IUnknown** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLE32.dll")]
public static extern int CoGetStdMarshalEx(IntPtr pUnkOuter, uint smexflags, IntPtr ppUnkInner);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_CoGetStdMarshalEx' -Namespace Win32 -PassThru
# $api::CoGetStdMarshalEx(pUnkOuter, smexflags, ppUnkInner)

#uselib "OLE32.dll"
#func global CoGetStdMarshalEx "CoGetStdMarshalEx" sptr, sptr, sptr
; CoGetStdMarshalEx pUnkOuter, smexflags, ppUnkInner   ; 戻り値は stat
; pUnkOuter : IUnknown* -> "sptr"
; smexflags : DWORD -> "sptr"
; ppUnkInner : 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 "OLE32.dll"
#cfunc global CoGetStdMarshalEx "CoGetStdMarshalEx" sptr, int, sptr
; res = CoGetStdMarshalEx(pUnkOuter, smexflags, ppUnkInner)
; pUnkOuter : IUnknown* -> "sptr"
; smexflags : DWORD -> "int"
; ppUnkInner : IUnknown** out -> "sptr"

; HRESULT CoGetStdMarshalEx(IUnknown* pUnkOuter, DWORD smexflags, IUnknown** ppUnkInner)
#uselib "OLE32.dll"
#cfunc global CoGetStdMarshalEx "CoGetStdMarshalEx" intptr, int, intptr
; res = CoGetStdMarshalEx(pUnkOuter, smexflags, ppUnkInner)
; pUnkOuter : IUnknown* -> "intptr"
; smexflags : DWORD -> "int"
; ppUnkInner : IUnknown** out -> "intptr"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procCoGetStdMarshalEx = ole32.NewProc("CoGetStdMarshalEx")
)

// pUnkOuter (IUnknown*), smexflags (DWORD), ppUnkInner (IUnknown** out)
r1, _, err := procCoGetStdMarshalEx.Call(
	uintptr(pUnkOuter),
	uintptr(smexflags),
	uintptr(ppUnkInner),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoGetStdMarshalEx(
  pUnkOuter: Pointer;   // IUnknown*
  smexflags: DWORD;   // DWORD
  ppUnkInner: Pointer   // IUnknown** out
): Integer; stdcall;
  external 'OLE32.dll' name 'CoGetStdMarshalEx';

result := DllCall("OLE32\CoGetStdMarshalEx"
    , "Ptr", pUnkOuter   ; IUnknown*
    , "UInt", smexflags   ; DWORD
    , "Ptr", ppUnkInner   ; IUnknown** out
    , "Int")   ; return: HRESULT

●CoGetStdMarshalEx(pUnkOuter, smexflags, ppUnkInner) = DLL("OLE32.dll", "int CoGetStdMarshalEx(void*, dword, void*)")
# 呼び出し: CoGetStdMarshalEx(pUnkOuter, smexflags, ppUnkInner)
# pUnkOuter : IUnknown* -> "void*"
# smexflags : DWORD -> "dword"
# ppUnkInner : 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)。