OleSavePictureFile

// OLEAUT32.dll
#include <windows.h>

HRESULT OleSavePictureFile(
    IDispatch* lpdispPicture,
    LPWSTR bstrFileName
);

<DllImport("OLEAUT32.dll", ExactSpelling:=True)>
Public Shared Function OleSavePictureFile(
    lpdispPicture As IntPtr,   ' IDispatch*
    <MarshalAs(UnmanagedType.LPWStr)> bstrFileName As String   ' LPWSTR
) As Integer
End Function

' lpdispPicture : IDispatch*
' bstrFileName : LPWSTR
Declare PtrSafe Function OleSavePictureFile Lib "oleaut32" ( _
    ByVal lpdispPicture As LongPtr, _
    ByVal bstrFileName 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

OleSavePictureFile = ctypes.windll.oleaut32.OleSavePictureFile
OleSavePictureFile.restype = ctypes.c_int
OleSavePictureFile.argtypes = [
    ctypes.c_void_p,  # lpdispPicture : IDispatch*
    wintypes.LPCWSTR,  # bstrFileName : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('OLEAUT32.dll')
OleSavePictureFile = Fiddle::Function.new(
  lib['OleSavePictureFile'],
  [
    Fiddle::TYPE_VOIDP,  # lpdispPicture : IDispatch*
    Fiddle::TYPE_VOIDP,  # bstrFileName : LPWSTR
  ],
  Fiddle::TYPE_INT)

#[link(name = "oleaut32")]
extern "system" {
    fn OleSavePictureFile(
        lpdispPicture: *mut core::ffi::c_void,  // IDispatch*
        bstrFileName: *mut u16  // LPWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("OLEAUT32.dll")]
public static extern int OleSavePictureFile(IntPtr lpdispPicture, [MarshalAs(UnmanagedType.LPWStr)] string bstrFileName);
"@
$api = Add-Type -MemberDefinition $sig -Name 'OLEAUT32_OleSavePictureFile' -Namespace Win32 -PassThru
# $api::OleSavePictureFile(lpdispPicture, bstrFileName)

#uselib "OLEAUT32.dll"
#func global OleSavePictureFile "OleSavePictureFile" sptr, sptr
; OleSavePictureFile lpdispPicture, bstrFileName   ; 戻り値は stat
; lpdispPicture : IDispatch* -> "sptr"
; bstrFileName : LPWSTR -> "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 "OLEAUT32.dll"
#cfunc global OleSavePictureFile "OleSavePictureFile" sptr, wstr
; res = OleSavePictureFile(lpdispPicture, bstrFileName)
; lpdispPicture : IDispatch* -> "sptr"
; bstrFileName : LPWSTR -> "wstr"

; HRESULT OleSavePictureFile(IDispatch* lpdispPicture, LPWSTR bstrFileName)
#uselib "OLEAUT32.dll"
#cfunc global OleSavePictureFile "OleSavePictureFile" intptr, wstr
; res = OleSavePictureFile(lpdispPicture, bstrFileName)
; lpdispPicture : IDispatch* -> "intptr"
; bstrFileName : LPWSTR -> "wstr"

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

var (
	oleaut32 = windows.NewLazySystemDLL("OLEAUT32.dll")
	procOleSavePictureFile = oleaut32.NewProc("OleSavePictureFile")
)

// lpdispPicture (IDispatch*), bstrFileName (LPWSTR)
r1, _, err := procOleSavePictureFile.Call(
	uintptr(lpdispPicture),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(bstrFileName))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function OleSavePictureFile(
  lpdispPicture: Pointer;   // IDispatch*
  bstrFileName: PWideChar   // LPWSTR
): Integer; stdcall;
  external 'OLEAUT32.dll' name 'OleSavePictureFile';

result := DllCall("OLEAUT32\OleSavePictureFile"
    , "Ptr", lpdispPicture   ; IDispatch*
    , "WStr", bstrFileName   ; LPWSTR
    , "Int")   ; return: HRESULT

●OleSavePictureFile(lpdispPicture, bstrFileName) = DLL("OLEAUT32.dll", "int OleSavePictureFile(void*, char*)")
# 呼び出し: OleSavePictureFile(lpdispPicture, bstrFileName)
# lpdispPicture : IDispatch* -> "void*"
# bstrFileName : LPWSTR -> "char*"
# 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)。