OleCreateDefaultHandler

// ole32.dll
#include <windows.h>

HRESULT OleCreateDefaultHandler(
    const GUID* clsid,
    IUnknown* pUnkOuter,
    const GUID* riid,
    void** lplpObj
);

<DllImport("ole32.dll", ExactSpelling:=True)>
Public Shared Function OleCreateDefaultHandler(
    ByRef clsid As Guid,   ' GUID*
    pUnkOuter As IntPtr,   ' IUnknown*
    ByRef riid As Guid,   ' GUID*
    lplpObj As IntPtr   ' void** out
) As Integer
End Function

' clsid : GUID*
' pUnkOuter : IUnknown*
' riid : GUID*
' lplpObj : void** out
Declare PtrSafe Function OleCreateDefaultHandler Lib "ole32" ( _
    ByVal clsid As LongPtr, _
    ByVal pUnkOuter As LongPtr, _
    ByVal riid As LongPtr, _
    ByVal lplpObj 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

OleCreateDefaultHandler = ctypes.windll.ole32.OleCreateDefaultHandler
OleCreateDefaultHandler.restype = ctypes.c_int
OleCreateDefaultHandler.argtypes = [
    ctypes.c_void_p,  # clsid : GUID*
    ctypes.c_void_p,  # pUnkOuter : IUnknown*
    ctypes.c_void_p,  # riid : GUID*
    ctypes.c_void_p,  # lplpObj : void** out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ole32.dll')
OleCreateDefaultHandler = Fiddle::Function.new(
  lib['OleCreateDefaultHandler'],
  [
    Fiddle::TYPE_VOIDP,  # clsid : GUID*
    Fiddle::TYPE_VOIDP,  # pUnkOuter : IUnknown*
    Fiddle::TYPE_VOIDP,  # riid : GUID*
    Fiddle::TYPE_VOIDP,  # lplpObj : void** out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn OleCreateDefaultHandler(
        clsid: *const GUID,  // GUID*
        pUnkOuter: *mut core::ffi::c_void,  // IUnknown*
        riid: *const GUID,  // GUID*
        lplpObj: *mut *mut ()  // void** out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ole32.dll")]
public static extern int OleCreateDefaultHandler(ref Guid clsid, IntPtr pUnkOuter, ref Guid riid, IntPtr lplpObj);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ole32_OleCreateDefaultHandler' -Namespace Win32 -PassThru
# $api::OleCreateDefaultHandler(clsid, pUnkOuter, riid, lplpObj)

#uselib "ole32.dll"
#func global OleCreateDefaultHandler "OleCreateDefaultHandler" sptr, sptr, sptr, sptr
; OleCreateDefaultHandler varptr(clsid), pUnkOuter, varptr(riid), lplpObj   ; 戻り値は stat
; clsid : GUID* -> "sptr"
; pUnkOuter : IUnknown* -> "sptr"
; riid : GUID* -> "sptr"
; lplpObj : 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 "ole32.dll"
#cfunc global OleCreateDefaultHandler "OleCreateDefaultHandler" var, sptr, var, sptr
; res = OleCreateDefaultHandler(clsid, pUnkOuter, riid, lplpObj)
; clsid : GUID* -> "var"
; pUnkOuter : IUnknown* -> "sptr"
; riid : GUID* -> "var"
; lplpObj : 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 OleCreateDefaultHandler(GUID* clsid, IUnknown* pUnkOuter, GUID* riid, void** lplpObj)
#uselib "ole32.dll"
#cfunc global OleCreateDefaultHandler "OleCreateDefaultHandler" var, intptr, var, intptr
; res = OleCreateDefaultHandler(clsid, pUnkOuter, riid, lplpObj)
; clsid : GUID* -> "var"
; pUnkOuter : IUnknown* -> "intptr"
; riid : GUID* -> "var"
; lplpObj : 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 (
	ole32 = windows.NewLazySystemDLL("ole32.dll")
	procOleCreateDefaultHandler = ole32.NewProc("OleCreateDefaultHandler")
)

// clsid (GUID*), pUnkOuter (IUnknown*), riid (GUID*), lplpObj (void** out)
r1, _, err := procOleCreateDefaultHandler.Call(
	uintptr(clsid),
	uintptr(pUnkOuter),
	uintptr(riid),
	uintptr(lplpObj),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function OleCreateDefaultHandler(
  clsid: PGUID;   // GUID*
  pUnkOuter: Pointer;   // IUnknown*
  riid: PGUID;   // GUID*
  lplpObj: Pointer   // void** out
): Integer; stdcall;
  external 'ole32.dll' name 'OleCreateDefaultHandler';

result := DllCall("ole32\OleCreateDefaultHandler"
    , "Ptr", clsid   ; GUID*
    , "Ptr", pUnkOuter   ; IUnknown*
    , "Ptr", riid   ; GUID*
    , "Ptr", lplpObj   ; void** out
    , "Int")   ; return: HRESULT

●OleCreateDefaultHandler(clsid, pUnkOuter, riid, lplpObj) = DLL("ole32.dll", "int OleCreateDefaultHandler(void*, void*, void*, void*)")
# 呼び出し: OleCreateDefaultHandler(clsid, pUnkOuter, riid, lplpObj)
# clsid : GUID* -> "void*"
# pUnkOuter : IUnknown* -> "void*"
# riid : GUID* -> "void*"
# lplpObj : 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)。