OleSave

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

HRESULT OleSave(
    IPersistStorage* pPS,
    IStorage* pStg,
    BOOL fSameAsLoad
);

<DllImport("OLE32.dll", ExactSpelling:=True)>
Public Shared Function OleSave(
    pPS As IntPtr,   ' IPersistStorage*
    pStg As IntPtr,   ' IStorage*
    fSameAsLoad As Boolean   ' BOOL
) As Integer
End Function

' pPS : IPersistStorage*
' pStg : IStorage*
' fSameAsLoad : BOOL
Declare PtrSafe Function OleSave Lib "ole32" ( _
    ByVal pPS As LongPtr, _
    ByVal pStg As LongPtr, _
    ByVal fSameAsLoad As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

OleSave = ctypes.windll.ole32.OleSave
OleSave.restype = ctypes.c_int
OleSave.argtypes = [
    ctypes.c_void_p,  # pPS : IPersistStorage*
    ctypes.c_void_p,  # pStg : IStorage*
    wintypes.BOOL,  # fSameAsLoad : BOOL
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLE32.dll')
OleSave = Fiddle::Function.new(
  lib['OleSave'],
  [
    Fiddle::TYPE_VOIDP,  # pPS : IPersistStorage*
    Fiddle::TYPE_VOIDP,  # pStg : IStorage*
    Fiddle::TYPE_INT,  # fSameAsLoad : BOOL
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("OLE32.dll")]
public static extern int OleSave(IntPtr pPS, IntPtr pStg, bool fSameAsLoad);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLE32_OleSave' -Namespace Win32 -PassThru
# $api::OleSave(pPS, pStg, fSameAsLoad)

#uselib "OLE32.dll"
#func global OleSave "OleSave" sptr, sptr, sptr
; OleSave pPS, pStg, fSameAsLoad   ; 戻り値は stat
; pPS : IPersistStorage* -> "sptr"
; pStg : IStorage* -> "sptr"
; fSameAsLoad : BOOL -> "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 OleSave "OleSave" sptr, sptr, int
; res = OleSave(pPS, pStg, fSameAsLoad)
; pPS : IPersistStorage* -> "sptr"
; pStg : IStorage* -> "sptr"
; fSameAsLoad : BOOL -> "int"

; HRESULT OleSave(IPersistStorage* pPS, IStorage* pStg, BOOL fSameAsLoad)
#uselib "OLE32.dll"
#cfunc global OleSave "OleSave" intptr, intptr, int
; res = OleSave(pPS, pStg, fSameAsLoad)
; pPS : IPersistStorage* -> "intptr"
; pStg : IStorage* -> "intptr"
; fSameAsLoad : BOOL -> "int"

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

var (
	ole32 = windows.NewLazySystemDLL("OLE32.dll")
	procOleSave = ole32.NewProc("OleSave")
)

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

function OleSave(
  pPS: Pointer;   // IPersistStorage*
  pStg: Pointer;   // IStorage*
  fSameAsLoad: BOOL   // BOOL
): Integer; stdcall;
  external 'OLE32.dll' name 'OleSave';

result := DllCall("OLE32\OleSave"
    , "Ptr", pPS   ; IPersistStorage*
    , "Ptr", pStg   ; IStorage*
    , "Int", fSameAsLoad   ; BOOL
    , "Int")   ; return: HRESULT

●OleSave(pPS, pStg, fSameAsLoad) = DLL("OLE32.dll", "int OleSave(void*, void*, bool)")
# 呼び出し: OleSave(pPS, pStg, fSameAsLoad)
# pPS : IPersistStorage* -> "void*"
# pStg : IStorage* -> "void*"
# fSameAsLoad : BOOL -> "bool"
# 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)。