CoCopyProxy

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

HRESULT CoCopyProxy(
    IUnknown* pProxy,
    IUnknown** ppCopy
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function CoCopyProxy(
    pProxy As IntPtr,   ' IUnknown*
    ppCopy As IntPtr   ' IUnknown** out
) As Integer
End Function

' pProxy : IUnknown*
' ppCopy : IUnknown** out
Declare PtrSafe Function CoCopyProxy Lib "ole32" ( _
    ByVal pProxy As LongPtr, _
    ByVal ppCopy 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

CoCopyProxy = ctypes.windll.ole32.CoCopyProxy
CoCopyProxy.restype = ctypes.c_int
CoCopyProxy.argtypes = [
    ctypes.c_void_p,  # pProxy : IUnknown*
    ctypes.c_void_p,  # ppCopy : IUnknown** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
CoCopyProxy = Fiddle::Function.new(
  lib['CoCopyProxy'],
  [
    Fiddle::TYPE_VOIDP,  # pProxy : IUnknown*
    Fiddle::TYPE_VOIDP,  # ppCopy : IUnknown** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn CoCopyProxy(
        pProxy: *mut core::ffi::c_void,  // IUnknown*
        ppCopy: *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 CoCopyProxy(IntPtr pProxy, IntPtr ppCopy);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_CoCopyProxy' -Namespace Win32 -PassThru
# $api::CoCopyProxy(pProxy, ppCopy)

#uselib "OLE32.dll"
#func global CoCopyProxy "CoCopyProxy" sptr, sptr
; CoCopyProxy pProxy, ppCopy   ; 戻り値は stat
; pProxy : IUnknown* -> "sptr"
; ppCopy : 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 CoCopyProxy "CoCopyProxy" sptr, sptr
; res = CoCopyProxy(pProxy, ppCopy)
; pProxy : IUnknown* -> "sptr"
; ppCopy : IUnknown** out -> "sptr"

; HRESULT CoCopyProxy(IUnknown* pProxy, IUnknown** ppCopy)
#uselib "OLE32.dll"
#cfunc global CoCopyProxy "CoCopyProxy" intptr, intptr
; res = CoCopyProxy(pProxy, ppCopy)
; pProxy : IUnknown* -> "intptr"
; ppCopy : IUnknown** out -> "intptr"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procCoCopyProxy = ole32.NewProc("CoCopyProxy")
)

// pProxy (IUnknown*), ppCopy (IUnknown** out)
r1, _, err := procCoCopyProxy.Call(
	uintptr(pProxy),
	uintptr(ppCopy),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function CoCopyProxy(
  pProxy: Pointer;   // IUnknown*
  ppCopy: Pointer   // IUnknown** out
): Integer; stdcall;
  external 'OLE32.dll' name 'CoCopyProxy';

result := DllCall("OLE32\CoCopyProxy"
    , "Ptr", pProxy   ; IUnknown*
    , "Ptr", ppCopy   ; IUnknown** out
    , "Int")   ; return: HRESULT

●CoCopyProxy(pProxy, ppCopy) = DLL("OLE32.dll", "int CoCopyProxy(void*, void*)")
# 呼び出し: CoCopyProxy(pProxy, ppCopy)
# pProxy : IUnknown* -> "void*"
# ppCopy : 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)。