GetConvertStg

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

HRESULT GetConvertStg(
    IStorage* pStg
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function GetConvertStg(
    pStg As IntPtr   ' IStorage*
) As Integer
End Function

' pStg : IStorage*
Declare PtrSafe Function GetConvertStg Lib "ole32" ( _
    ByVal pStg 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

GetConvertStg = ctypes.windll.ole32.GetConvertStg
GetConvertStg.restype = ctypes.c_int
GetConvertStg.argtypes = [
    ctypes.c_void_p,  # pStg : IStorage*
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
GetConvertStg = Fiddle::Function.new(
  lib['GetConvertStg'],
  [
    Fiddle::TYPE_VOIDP,  # pStg : IStorage*
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("OLE32.dll")]
public static extern int GetConvertStg(IntPtr pStg);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_GetConvertStg' -Namespace Win32 -PassThru
# $api::GetConvertStg(pStg)

#uselib "OLE32.dll"
#func global GetConvertStg "GetConvertStg" sptr
; GetConvertStg pStg   ; 戻り値は stat
; pStg : IStorage* -> "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 GetConvertStg "GetConvertStg" sptr
; res = GetConvertStg(pStg)
; pStg : IStorage* -> "sptr"

; HRESULT GetConvertStg(IStorage* pStg)
#uselib "OLE32.dll"
#cfunc global GetConvertStg "GetConvertStg" intptr
; res = GetConvertStg(pStg)
; pStg : IStorage* -> "intptr"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procGetConvertStg = ole32.NewProc("GetConvertStg")
)

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

function GetConvertStg(
  pStg: Pointer   // IStorage*
): Integer; stdcall;
  external 'OLE32.dll' name 'GetConvertStg';

result := DllCall("OLE32\GetConvertStg"
    , "Ptr", pStg   ; IStorage*
    , "Int")   ; return: HRESULT

●GetConvertStg(pStg) = DLL("OLE32.dll", "int GetConvertStg(void*)")
# 呼び出し: GetConvertStg(pStg)
# pStg : IStorage* -> "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)。