OleConvertIStorageToOLESTREAMEx

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

HRESULT OleConvertIStorageToOLESTREAMEx(
    IStorage* pstg,
    WORD cfFormat,
    INT lWidth,
    INT lHeight,
    DWORD dwSize,
    STGMEDIUM* pmedium,
    OLESTREAM* polestm
);

<DllImport("ole32.dll", ExactSpelling:=True)>
Public Shared Function OleConvertIStorageToOLESTREAMEx(
    pstg As IntPtr,   ' IStorage*
    cfFormat As UShort,   ' WORD
    lWidth As Integer,   ' INT
    lHeight As Integer,   ' INT
    dwSize As UInteger,   ' DWORD
    pmedium As IntPtr,   ' STGMEDIUM*
    polestm As IntPtr   ' OLESTREAM* out
) As Integer
End Function

' pstg : IStorage*
' cfFormat : WORD
' lWidth : INT
' lHeight : INT
' dwSize : DWORD
' pmedium : STGMEDIUM*
' polestm : OLESTREAM* out
Declare PtrSafe Function OleConvertIStorageToOLESTREAMEx Lib "ole32" ( _
    ByVal pstg As LongPtr, _
    ByVal cfFormat As Integer, _
    ByVal lWidth As Long, _
    ByVal lHeight As Long, _
    ByVal dwSize As Long, _
    ByVal pmedium As LongPtr, _
    ByVal polestm 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

OleConvertIStorageToOLESTREAMEx = ctypes.windll.ole32.OleConvertIStorageToOLESTREAMEx
OleConvertIStorageToOLESTREAMEx.restype = ctypes.c_int
OleConvertIStorageToOLESTREAMEx.argtypes = [
    ctypes.c_void_p,  # pstg : IStorage*
    ctypes.c_ushort,  # cfFormat : WORD
    ctypes.c_int,  # lWidth : INT
    ctypes.c_int,  # lHeight : INT
    wintypes.DWORD,  # dwSize : DWORD
    ctypes.c_void_p,  # pmedium : STGMEDIUM*
    ctypes.c_void_p,  # polestm : OLESTREAM* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ole32.dll')
OleConvertIStorageToOLESTREAMEx = Fiddle::Function.new(
  lib['OleConvertIStorageToOLESTREAMEx'],
  [
    Fiddle::TYPE_VOIDP,  # pstg : IStorage*
    -Fiddle::TYPE_SHORT,  # cfFormat : WORD
    Fiddle::TYPE_INT,  # lWidth : INT
    Fiddle::TYPE_INT,  # lHeight : INT
    -Fiddle::TYPE_INT,  # dwSize : DWORD
    Fiddle::TYPE_VOIDP,  # pmedium : STGMEDIUM*
    Fiddle::TYPE_VOIDP,  # polestm : OLESTREAM* out
  ],
  Fiddle::TYPE_INT)

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

$sig = @"
[DllImport("ole32.dll")]
public static extern int OleConvertIStorageToOLESTREAMEx(IntPtr pstg, ushort cfFormat, int lWidth, int lHeight, uint dwSize, IntPtr pmedium, IntPtr polestm);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ole32_OleConvertIStorageToOLESTREAMEx' -Namespace Win32 -PassThru
# $api::OleConvertIStorageToOLESTREAMEx(pstg, cfFormat, lWidth, lHeight, dwSize, pmedium, polestm)

#uselib "ole32.dll"
#func global OleConvertIStorageToOLESTREAMEx "OleConvertIStorageToOLESTREAMEx" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; OleConvertIStorageToOLESTREAMEx pstg, cfFormat, lWidth, lHeight, dwSize, varptr(pmedium), varptr(polestm)   ; 戻り値は stat
; pstg : IStorage* -> "sptr"
; cfFormat : WORD -> "sptr"
; lWidth : INT -> "sptr"
; lHeight : INT -> "sptr"
; dwSize : DWORD -> "sptr"
; pmedium : STGMEDIUM* -> "sptr"
; polestm : OLESTREAM* 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 OleConvertIStorageToOLESTREAMEx "OleConvertIStorageToOLESTREAMEx" sptr, int, int, int, int, var, var
; res = OleConvertIStorageToOLESTREAMEx(pstg, cfFormat, lWidth, lHeight, dwSize, pmedium, polestm)
; pstg : IStorage* -> "sptr"
; cfFormat : WORD -> "int"
; lWidth : INT -> "int"
; lHeight : INT -> "int"
; dwSize : DWORD -> "int"
; pmedium : STGMEDIUM* -> "var"
; polestm : OLESTREAM* 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 OleConvertIStorageToOLESTREAMEx(IStorage* pstg, WORD cfFormat, INT lWidth, INT lHeight, DWORD dwSize, STGMEDIUM* pmedium, OLESTREAM* polestm)
#uselib "ole32.dll"
#cfunc global OleConvertIStorageToOLESTREAMEx "OleConvertIStorageToOLESTREAMEx" intptr, int, int, int, int, var, var
; res = OleConvertIStorageToOLESTREAMEx(pstg, cfFormat, lWidth, lHeight, dwSize, pmedium, polestm)
; pstg : IStorage* -> "intptr"
; cfFormat : WORD -> "int"
; lWidth : INT -> "int"
; lHeight : INT -> "int"
; dwSize : DWORD -> "int"
; pmedium : STGMEDIUM* -> "var"
; polestm : OLESTREAM* 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")
	procOleConvertIStorageToOLESTREAMEx = ole32.NewProc("OleConvertIStorageToOLESTREAMEx")
)

// pstg (IStorage*), cfFormat (WORD), lWidth (INT), lHeight (INT), dwSize (DWORD), pmedium (STGMEDIUM*), polestm (OLESTREAM* out)
r1, _, err := procOleConvertIStorageToOLESTREAMEx.Call(
	uintptr(pstg),
	uintptr(cfFormat),
	uintptr(lWidth),
	uintptr(lHeight),
	uintptr(dwSize),
	uintptr(pmedium),
	uintptr(polestm),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function OleConvertIStorageToOLESTREAMEx(
  pstg: Pointer;   // IStorage*
  cfFormat: Word;   // WORD
  lWidth: Integer;   // INT
  lHeight: Integer;   // INT
  dwSize: DWORD;   // DWORD
  pmedium: Pointer;   // STGMEDIUM*
  polestm: Pointer   // OLESTREAM* out
): Integer; stdcall;
  external 'ole32.dll' name 'OleConvertIStorageToOLESTREAMEx';

result := DllCall("ole32\OleConvertIStorageToOLESTREAMEx"
    , "Ptr", pstg   ; IStorage*
    , "UShort", cfFormat   ; WORD
    , "Int", lWidth   ; INT
    , "Int", lHeight   ; INT
    , "UInt", dwSize   ; DWORD
    , "Ptr", pmedium   ; STGMEDIUM*
    , "Ptr", polestm   ; OLESTREAM* out
    , "Int")   ; return: HRESULT

●OleConvertIStorageToOLESTREAMEx(pstg, cfFormat, lWidth, lHeight, dwSize, pmedium, polestm) = DLL("ole32.dll", "int OleConvertIStorageToOLESTREAMEx(void*, int, int, int, dword, void*, void*)")
# 呼び出し: OleConvertIStorageToOLESTREAMEx(pstg, cfFormat, lWidth, lHeight, dwSize, pmedium, polestm)
# pstg : IStorage* -> "void*"
# cfFormat : WORD -> "int"
# lWidth : INT -> "int"
# lHeight : INT -> "int"
# dwSize : DWORD -> "dword"
# pmedium : STGMEDIUM* -> "void*"
# polestm : OLESTREAM* 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)。