OleDoAutoConvert

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

HRESULT OleDoAutoConvert(
    IStorage* pStg,
    GUID* pClsidNew
);

<DllImport("ole32.dll", ExactSpelling:=True)>
Public Shared Function OleDoAutoConvert(
    pStg As IntPtr,   ' IStorage*
    <Out> ByRef pClsidNew As Guid   ' GUID* out
) As Integer
End Function

' pStg : IStorage*
' pClsidNew : GUID* out
Declare PtrSafe Function OleDoAutoConvert Lib "ole32" ( _
    ByVal pStg As LongPtr, _
    ByVal pClsidNew 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

OleDoAutoConvert = ctypes.windll.ole32.OleDoAutoConvert
OleDoAutoConvert.restype = ctypes.c_int
OleDoAutoConvert.argtypes = [
    ctypes.c_void_p,  # pStg : IStorage*
    ctypes.c_void_p,  # pClsidNew : GUID* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ole32.dll')
OleDoAutoConvert = Fiddle::Function.new(
  lib['OleDoAutoConvert'],
  [
    Fiddle::TYPE_VOIDP,  # pStg : IStorage*
    Fiddle::TYPE_VOIDP,  # pClsidNew : GUID* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn OleDoAutoConvert(
        pStg: *mut core::ffi::c_void,  // IStorage*
        pClsidNew: *mut GUID  // GUID* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ole32.dll")]
public static extern int OleDoAutoConvert(IntPtr pStg, out Guid pClsidNew);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ole32_OleDoAutoConvert' -Namespace Win32 -PassThru
# $api::OleDoAutoConvert(pStg, pClsidNew)

#uselib "ole32.dll"
#func global OleDoAutoConvert "OleDoAutoConvert" sptr, sptr
; OleDoAutoConvert pStg, varptr(pClsidNew)   ; 戻り値は stat
; pStg : IStorage* -> "sptr"
; pClsidNew : GUID* 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 OleDoAutoConvert "OleDoAutoConvert" sptr, var
; res = OleDoAutoConvert(pStg, pClsidNew)
; pStg : IStorage* -> "sptr"
; pClsidNew : GUID* out -> "var"
; ※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 OleDoAutoConvert(IStorage* pStg, GUID* pClsidNew)
#uselib "ole32.dll"
#cfunc global OleDoAutoConvert "OleDoAutoConvert" intptr, var
; res = OleDoAutoConvert(pStg, pClsidNew)
; pStg : IStorage* -> "intptr"
; pClsidNew : GUID* out -> "var"
; ※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")
	procOleDoAutoConvert = ole32.NewProc("OleDoAutoConvert")
)

// pStg (IStorage*), pClsidNew (GUID* out)
r1, _, err := procOleDoAutoConvert.Call(
	uintptr(pStg),
	uintptr(pClsidNew),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function OleDoAutoConvert(
  pStg: Pointer;   // IStorage*
  pClsidNew: PGUID   // GUID* out
): Integer; stdcall;
  external 'ole32.dll' name 'OleDoAutoConvert';

result := DllCall("ole32\OleDoAutoConvert"
    , "Ptr", pStg   ; IStorage*
    , "Ptr", pClsidNew   ; GUID* out
    , "Int")   ; return: HRESULT

●OleDoAutoConvert(pStg, pClsidNew) = DLL("ole32.dll", "int OleDoAutoConvert(void*, void*)")
# 呼び出し: OleDoAutoConvert(pStg, pClsidNew)
# pStg : IStorage* -> "void*"
# pClsidNew : GUID* 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)。