FileSaveRestoreW

// ADVPACK.dll  (Unicode / -W)
#include <windows.h>

HRESULT FileSaveRestoreW(
    HWND hDlg,
    LPWSTR lpFileList,   // optional
    LPCWSTR lpDir,
    LPCWSTR lpBaseName,
    DWORD dwFlags
);

<DllImport("ADVPACK.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function FileSaveRestoreW(
    hDlg As IntPtr,   ' HWND
    <MarshalAs(UnmanagedType.LPWStr)> lpFileList As String,   ' LPWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpDir As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> lpBaseName As String,   ' LPCWSTR
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hDlg : HWND
' lpFileList : LPWSTR optional
' lpDir : LPCWSTR
' lpBaseName : LPCWSTR
' dwFlags : DWORD
Declare PtrSafe Function FileSaveRestoreW Lib "advpack" ( _
    ByVal hDlg As LongPtr, _
    ByVal lpFileList As LongPtr, _
    ByVal lpDir As LongPtr, _
    ByVal lpBaseName As LongPtr, _
    ByVal dwFlags As Long) As Long
' Unicode(W): 文字列は ByVal As LongPtr とし StrPtr(unicodeStr) を渡す
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

FileSaveRestoreW = ctypes.windll.advpack.FileSaveRestoreW
FileSaveRestoreW.restype = ctypes.c_int
FileSaveRestoreW.argtypes = [
    wintypes.HANDLE,  # hDlg : HWND
    wintypes.LPCWSTR,  # lpFileList : LPWSTR optional
    wintypes.LPCWSTR,  # lpDir : LPCWSTR
    wintypes.LPCWSTR,  # lpBaseName : LPCWSTR
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVPACK.dll')
FileSaveRestoreW = Fiddle::Function.new(
  lib['FileSaveRestoreW'],
  [
    Fiddle::TYPE_VOIDP,  # hDlg : HWND
    Fiddle::TYPE_VOIDP,  # lpFileList : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # lpDir : LPCWSTR
    Fiddle::TYPE_VOIDP,  # lpBaseName : LPCWSTR
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advpack")]
extern "system" {
    fn FileSaveRestoreW(
        hDlg: *mut core::ffi::c_void,  // HWND
        lpFileList: *mut u16,  // LPWSTR optional
        lpDir: *const u16,  // LPCWSTR
        lpBaseName: *const u16,  // LPCWSTR
        dwFlags: u32  // DWORD
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVPACK.dll", CharSet = CharSet.Unicode)]
public static extern int FileSaveRestoreW(IntPtr hDlg, [MarshalAs(UnmanagedType.LPWStr)] string lpFileList, [MarshalAs(UnmanagedType.LPWStr)] string lpDir, [MarshalAs(UnmanagedType.LPWStr)] string lpBaseName, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVPACK_FileSaveRestoreW' -Namespace Win32 -PassThru
# $api::FileSaveRestoreW(hDlg, lpFileList, lpDir, lpBaseName, dwFlags)

#uselib "ADVPACK.dll"
#func global FileSaveRestoreW "FileSaveRestoreW" wptr, wptr, wptr, wptr, wptr
; FileSaveRestoreW hDlg, lpFileList, lpDir, lpBaseName, dwFlags   ; 戻り値は stat
; hDlg : HWND -> "wptr"
; lpFileList : LPWSTR optional -> "wptr"
; lpDir : LPCWSTR -> "wptr"
; lpBaseName : LPCWSTR -> "wptr"
; dwFlags : DWORD -> "wptr"
; ※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 "ADVPACK.dll"
#cfunc global FileSaveRestoreW "FileSaveRestoreW" sptr, wstr, wstr, wstr, int
; res = FileSaveRestoreW(hDlg, lpFileList, lpDir, lpBaseName, dwFlags)
; hDlg : HWND -> "sptr"
; lpFileList : LPWSTR optional -> "wstr"
; lpDir : LPCWSTR -> "wstr"
; lpBaseName : LPCWSTR -> "wstr"
; dwFlags : DWORD -> "int"

; HRESULT FileSaveRestoreW(HWND hDlg, LPWSTR lpFileList, LPCWSTR lpDir, LPCWSTR lpBaseName, DWORD dwFlags)
#uselib "ADVPACK.dll"
#cfunc global FileSaveRestoreW "FileSaveRestoreW" intptr, wstr, wstr, wstr, int
; res = FileSaveRestoreW(hDlg, lpFileList, lpDir, lpBaseName, dwFlags)
; hDlg : HWND -> "intptr"
; lpFileList : LPWSTR optional -> "wstr"
; lpDir : LPCWSTR -> "wstr"
; lpBaseName : LPCWSTR -> "wstr"
; dwFlags : DWORD -> "int"

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

var (
	advpack = windows.NewLazySystemDLL("ADVPACK.dll")
	procFileSaveRestoreW = advpack.NewProc("FileSaveRestoreW")
)

// hDlg (HWND), lpFileList (LPWSTR optional), lpDir (LPCWSTR), lpBaseName (LPCWSTR), dwFlags (DWORD)
r1, _, err := procFileSaveRestoreW.Call(
	uintptr(hDlg),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpFileList))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpDir))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpBaseName))),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function FileSaveRestoreW(
  hDlg: THandle;   // HWND
  lpFileList: PWideChar;   // LPWSTR optional
  lpDir: PWideChar;   // LPCWSTR
  lpBaseName: PWideChar;   // LPCWSTR
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'ADVPACK.dll' name 'FileSaveRestoreW';

result := DllCall("ADVPACK\FileSaveRestoreW"
    , "Ptr", hDlg   ; HWND
    , "WStr", lpFileList   ; LPWSTR optional
    , "WStr", lpDir   ; LPCWSTR
    , "WStr", lpBaseName   ; LPCWSTR
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●FileSaveRestoreW(hDlg, lpFileList, lpDir, lpBaseName, dwFlags) = DLL("ADVPACK.dll", "int FileSaveRestoreW(void*, char*, char*, char*, dword)")
# 呼び出し: FileSaveRestoreW(hDlg, lpFileList, lpDir, lpBaseName, dwFlags)
# hDlg : HWND -> "void*"
# lpFileList : LPWSTR optional -> "char*"
# lpDir : LPCWSTR -> "char*"
# lpBaseName : LPCWSTR -> "char*"
# dwFlags : DWORD -> "dword"
# 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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。