OleConvertOLESTREAMToIStorageEx

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

HRESULT OleConvertOLESTREAMToIStorageEx(
    OLESTREAM* polestm,
    IStorage* pstg,
    WORD* pcfFormat,
    INT* plwWidth,
    INT* plHeight,
    DWORD* pdwSize,
    STGMEDIUM* pmedium
);

<DllImport("ole32.dll", ExactSpelling:=True)>
Public Shared Function OleConvertOLESTREAMToIStorageEx(
    polestm As IntPtr,   ' OLESTREAM*
    pstg As IntPtr,   ' IStorage*
    <Out> ByRef pcfFormat As UShort,   ' WORD* out
    <Out> ByRef plwWidth As Integer,   ' INT* out
    <Out> ByRef plHeight As Integer,   ' INT* out
    <Out> ByRef pdwSize As UInteger,   ' DWORD* out
    pmedium As IntPtr   ' STGMEDIUM* out
) As Integer
End Function

' polestm : OLESTREAM*
' pstg : IStorage*
' pcfFormat : WORD* out
' plwWidth : INT* out
' plHeight : INT* out
' pdwSize : DWORD* out
' pmedium : STGMEDIUM* out
Declare PtrSafe Function OleConvertOLESTREAMToIStorageEx Lib "ole32" ( _
    ByVal polestm As LongPtr, _
    ByVal pstg As LongPtr, _
    ByRef pcfFormat As Integer, _
    ByRef plwWidth As Long, _
    ByRef plHeight As Long, _
    ByRef pdwSize As Long, _
    ByVal pmedium 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

OleConvertOLESTREAMToIStorageEx = ctypes.windll.ole32.OleConvertOLESTREAMToIStorageEx
OleConvertOLESTREAMToIStorageEx.restype = ctypes.c_int
OleConvertOLESTREAMToIStorageEx.argtypes = [
    ctypes.c_void_p,  # polestm : OLESTREAM*
    ctypes.c_void_p,  # pstg : IStorage*
    ctypes.POINTER(ctypes.c_ushort),  # pcfFormat : WORD* out
    ctypes.POINTER(ctypes.c_int),  # plwWidth : INT* out
    ctypes.POINTER(ctypes.c_int),  # plHeight : INT* out
    ctypes.POINTER(wintypes.DWORD),  # pdwSize : DWORD* out
    ctypes.c_void_p,  # pmedium : STGMEDIUM* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ole32.dll')
OleConvertOLESTREAMToIStorageEx = Fiddle::Function.new(
  lib['OleConvertOLESTREAMToIStorageEx'],
  [
    Fiddle::TYPE_VOIDP,  # polestm : OLESTREAM*
    Fiddle::TYPE_VOIDP,  # pstg : IStorage*
    Fiddle::TYPE_VOIDP,  # pcfFormat : WORD* out
    Fiddle::TYPE_VOIDP,  # plwWidth : INT* out
    Fiddle::TYPE_VOIDP,  # plHeight : INT* out
    Fiddle::TYPE_VOIDP,  # pdwSize : DWORD* out
    Fiddle::TYPE_VOIDP,  # pmedium : STGMEDIUM* out
  ],
  Fiddle::TYPE_INT)

#[link(name = "ole32")]
extern "system" {
    fn OleConvertOLESTREAMToIStorageEx(
        polestm: *mut OLESTREAM,  // OLESTREAM*
        pstg: *mut core::ffi::c_void,  // IStorage*
        pcfFormat: *mut u16,  // WORD* out
        plwWidth: *mut i32,  // INT* out
        plHeight: *mut i32,  // INT* out
        pdwSize: *mut u32,  // DWORD* out
        pmedium: *mut STGMEDIUM  // STGMEDIUM* out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ole32.dll")]
public static extern int OleConvertOLESTREAMToIStorageEx(IntPtr polestm, IntPtr pstg, out ushort pcfFormat, out int plwWidth, out int plHeight, out uint pdwSize, IntPtr pmedium);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ole32_OleConvertOLESTREAMToIStorageEx' -Namespace Win32 -PassThru
# $api::OleConvertOLESTREAMToIStorageEx(polestm, pstg, pcfFormat, plwWidth, plHeight, pdwSize, pmedium)

#uselib "ole32.dll"
#func global OleConvertOLESTREAMToIStorageEx "OleConvertOLESTREAMToIStorageEx" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; OleConvertOLESTREAMToIStorageEx varptr(polestm), pstg, varptr(pcfFormat), varptr(plwWidth), varptr(plHeight), varptr(pdwSize), varptr(pmedium)   ; 戻り値は stat
; polestm : OLESTREAM* -> "sptr"
; pstg : IStorage* -> "sptr"
; pcfFormat : WORD* out -> "sptr"
; plwWidth : INT* out -> "sptr"
; plHeight : INT* out -> "sptr"
; pdwSize : DWORD* out -> "sptr"
; pmedium : STGMEDIUM* 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 OleConvertOLESTREAMToIStorageEx "OleConvertOLESTREAMToIStorageEx" var, sptr, var, var, var, var, var
; res = OleConvertOLESTREAMToIStorageEx(polestm, pstg, pcfFormat, plwWidth, plHeight, pdwSize, pmedium)
; polestm : OLESTREAM* -> "var"
; pstg : IStorage* -> "sptr"
; pcfFormat : WORD* out -> "var"
; plwWidth : INT* out -> "var"
; plHeight : INT* out -> "var"
; pdwSize : DWORD* out -> "var"
; pmedium : STGMEDIUM* 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 OleConvertOLESTREAMToIStorageEx(OLESTREAM* polestm, IStorage* pstg, WORD* pcfFormat, INT* plwWidth, INT* plHeight, DWORD* pdwSize, STGMEDIUM* pmedium)
#uselib "ole32.dll"
#cfunc global OleConvertOLESTREAMToIStorageEx "OleConvertOLESTREAMToIStorageEx" var, intptr, var, var, var, var, var
; res = OleConvertOLESTREAMToIStorageEx(polestm, pstg, pcfFormat, plwWidth, plHeight, pdwSize, pmedium)
; polestm : OLESTREAM* -> "var"
; pstg : IStorage* -> "intptr"
; pcfFormat : WORD* out -> "var"
; plwWidth : INT* out -> "var"
; plHeight : INT* out -> "var"
; pdwSize : DWORD* out -> "var"
; pmedium : STGMEDIUM* 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")
	procOleConvertOLESTREAMToIStorageEx = ole32.NewProc("OleConvertOLESTREAMToIStorageEx")
)

// polestm (OLESTREAM*), pstg (IStorage*), pcfFormat (WORD* out), plwWidth (INT* out), plHeight (INT* out), pdwSize (DWORD* out), pmedium (STGMEDIUM* out)
r1, _, err := procOleConvertOLESTREAMToIStorageEx.Call(
	uintptr(polestm),
	uintptr(pstg),
	uintptr(pcfFormat),
	uintptr(plwWidth),
	uintptr(plHeight),
	uintptr(pdwSize),
	uintptr(pmedium),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function OleConvertOLESTREAMToIStorageEx(
  polestm: Pointer;   // OLESTREAM*
  pstg: Pointer;   // IStorage*
  pcfFormat: Pointer;   // WORD* out
  plwWidth: Pointer;   // INT* out
  plHeight: Pointer;   // INT* out
  pdwSize: Pointer;   // DWORD* out
  pmedium: Pointer   // STGMEDIUM* out
): Integer; stdcall;
  external 'ole32.dll' name 'OleConvertOLESTREAMToIStorageEx';

result := DllCall("ole32\OleConvertOLESTREAMToIStorageEx"
    , "Ptr", polestm   ; OLESTREAM*
    , "Ptr", pstg   ; IStorage*
    , "Ptr", pcfFormat   ; WORD* out
    , "Ptr", plwWidth   ; INT* out
    , "Ptr", plHeight   ; INT* out
    , "Ptr", pdwSize   ; DWORD* out
    , "Ptr", pmedium   ; STGMEDIUM* out
    , "Int")   ; return: HRESULT

●OleConvertOLESTREAMToIStorageEx(polestm, pstg, pcfFormat, plwWidth, plHeight, pdwSize, pmedium) = DLL("ole32.dll", "int OleConvertOLESTREAMToIStorageEx(void*, void*, void*, void*, void*, void*, void*)")
# 呼び出し: OleConvertOLESTREAMToIStorageEx(polestm, pstg, pcfFormat, plwWidth, plHeight, pdwSize, pmedium)
# polestm : OLESTREAM* -> "void*"
# pstg : IStorage* -> "void*"
# pcfFormat : WORD* out -> "void*"
# plwWidth : INT* out -> "void*"
# plHeight : INT* out -> "void*"
# pdwSize : DWORD* out -> "void*"
# pmedium : STGMEDIUM* 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)。