RegSaveRestoreW

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

HRESULT RegSaveRestoreW(
    HWND hWnd,
    LPCWSTR pszTitleString,
    HKEY hkBckupKey,
    LPCWSTR pcszRootKey,
    LPCWSTR pcszSubKey,
    LPCWSTR pcszValueName,
    DWORD dwFlags
);

<DllImport("ADVPACK.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function RegSaveRestoreW(
    hWnd As IntPtr,   ' HWND
    <MarshalAs(UnmanagedType.LPWStr)> pszTitleString As String,   ' LPCWSTR
    hkBckupKey As IntPtr,   ' HKEY
    <MarshalAs(UnmanagedType.LPWStr)> pcszRootKey As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> pcszSubKey As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> pcszValueName As String,   ' LPCWSTR
    dwFlags As UInteger   ' DWORD
) As Integer
End Function

' hWnd : HWND
' pszTitleString : LPCWSTR
' hkBckupKey : HKEY
' pcszRootKey : LPCWSTR
' pcszSubKey : LPCWSTR
' pcszValueName : LPCWSTR
' dwFlags : DWORD
Declare PtrSafe Function RegSaveRestoreW Lib "advpack" ( _
    ByVal hWnd As LongPtr, _
    ByVal pszTitleString As LongPtr, _
    ByVal hkBckupKey As LongPtr, _
    ByVal pcszRootKey As LongPtr, _
    ByVal pcszSubKey As LongPtr, _
    ByVal pcszValueName 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

RegSaveRestoreW = ctypes.windll.advpack.RegSaveRestoreW
RegSaveRestoreW.restype = ctypes.c_int
RegSaveRestoreW.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND
    wintypes.LPCWSTR,  # pszTitleString : LPCWSTR
    wintypes.HANDLE,  # hkBckupKey : HKEY
    wintypes.LPCWSTR,  # pcszRootKey : LPCWSTR
    wintypes.LPCWSTR,  # pcszSubKey : LPCWSTR
    wintypes.LPCWSTR,  # pcszValueName : LPCWSTR
    wintypes.DWORD,  # dwFlags : DWORD
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVPACK.dll')
RegSaveRestoreW = Fiddle::Function.new(
  lib['RegSaveRestoreW'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND
    Fiddle::TYPE_VOIDP,  # pszTitleString : LPCWSTR
    Fiddle::TYPE_VOIDP,  # hkBckupKey : HKEY
    Fiddle::TYPE_VOIDP,  # pcszRootKey : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pcszSubKey : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pcszValueName : LPCWSTR
    -Fiddle::TYPE_INT,  # dwFlags : DWORD
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advpack")]
extern "system" {
    fn RegSaveRestoreW(
        hWnd: *mut core::ffi::c_void,  // HWND
        pszTitleString: *const u16,  // LPCWSTR
        hkBckupKey: *mut core::ffi::c_void,  // HKEY
        pcszRootKey: *const u16,  // LPCWSTR
        pcszSubKey: *const u16,  // LPCWSTR
        pcszValueName: *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 RegSaveRestoreW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)] string pszTitleString, IntPtr hkBckupKey, [MarshalAs(UnmanagedType.LPWStr)] string pcszRootKey, [MarshalAs(UnmanagedType.LPWStr)] string pcszSubKey, [MarshalAs(UnmanagedType.LPWStr)] string pcszValueName, uint dwFlags);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVPACK_RegSaveRestoreW' -Namespace Win32 -PassThru
# $api::RegSaveRestoreW(hWnd, pszTitleString, hkBckupKey, pcszRootKey, pcszSubKey, pcszValueName, dwFlags)

#uselib "ADVPACK.dll"
#func global RegSaveRestoreW "RegSaveRestoreW" wptr, wptr, wptr, wptr, wptr, wptr, wptr
; RegSaveRestoreW hWnd, pszTitleString, hkBckupKey, pcszRootKey, pcszSubKey, pcszValueName, dwFlags   ; 戻り値は stat
; hWnd : HWND -> "wptr"
; pszTitleString : LPCWSTR -> "wptr"
; hkBckupKey : HKEY -> "wptr"
; pcszRootKey : LPCWSTR -> "wptr"
; pcszSubKey : LPCWSTR -> "wptr"
; pcszValueName : 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 RegSaveRestoreW "RegSaveRestoreW" sptr, wstr, sptr, wstr, wstr, wstr, int
; res = RegSaveRestoreW(hWnd, pszTitleString, hkBckupKey, pcszRootKey, pcszSubKey, pcszValueName, dwFlags)
; hWnd : HWND -> "sptr"
; pszTitleString : LPCWSTR -> "wstr"
; hkBckupKey : HKEY -> "sptr"
; pcszRootKey : LPCWSTR -> "wstr"
; pcszSubKey : LPCWSTR -> "wstr"
; pcszValueName : LPCWSTR -> "wstr"
; dwFlags : DWORD -> "int"

; HRESULT RegSaveRestoreW(HWND hWnd, LPCWSTR pszTitleString, HKEY hkBckupKey, LPCWSTR pcszRootKey, LPCWSTR pcszSubKey, LPCWSTR pcszValueName, DWORD dwFlags)
#uselib "ADVPACK.dll"
#cfunc global RegSaveRestoreW "RegSaveRestoreW" intptr, wstr, intptr, wstr, wstr, wstr, int
; res = RegSaveRestoreW(hWnd, pszTitleString, hkBckupKey, pcszRootKey, pcszSubKey, pcszValueName, dwFlags)
; hWnd : HWND -> "intptr"
; pszTitleString : LPCWSTR -> "wstr"
; hkBckupKey : HKEY -> "intptr"
; pcszRootKey : LPCWSTR -> "wstr"
; pcszSubKey : LPCWSTR -> "wstr"
; pcszValueName : LPCWSTR -> "wstr"
; dwFlags : DWORD -> "int"

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

var (
	advpack = windows.NewLazySystemDLL("ADVPACK.dll")
	procRegSaveRestoreW = advpack.NewProc("RegSaveRestoreW")
)

// hWnd (HWND), pszTitleString (LPCWSTR), hkBckupKey (HKEY), pcszRootKey (LPCWSTR), pcszSubKey (LPCWSTR), pcszValueName (LPCWSTR), dwFlags (DWORD)
r1, _, err := procRegSaveRestoreW.Call(
	uintptr(hWnd),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszTitleString))),
	uintptr(hkBckupKey),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pcszRootKey))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pcszSubKey))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pcszValueName))),
	uintptr(dwFlags),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // HRESULT

function RegSaveRestoreW(
  hWnd: THandle;   // HWND
  pszTitleString: PWideChar;   // LPCWSTR
  hkBckupKey: THandle;   // HKEY
  pcszRootKey: PWideChar;   // LPCWSTR
  pcszSubKey: PWideChar;   // LPCWSTR
  pcszValueName: PWideChar;   // LPCWSTR
  dwFlags: DWORD   // DWORD
): Integer; stdcall;
  external 'ADVPACK.dll' name 'RegSaveRestoreW';

result := DllCall("ADVPACK\RegSaveRestoreW"
    , "Ptr", hWnd   ; HWND
    , "WStr", pszTitleString   ; LPCWSTR
    , "Ptr", hkBckupKey   ; HKEY
    , "WStr", pcszRootKey   ; LPCWSTR
    , "WStr", pcszSubKey   ; LPCWSTR
    , "WStr", pcszValueName   ; LPCWSTR
    , "UInt", dwFlags   ; DWORD
    , "Int")   ; return: HRESULT

●RegSaveRestoreW(hWnd, pszTitleString, hkBckupKey, pcszRootKey, pcszSubKey, pcszValueName, dwFlags) = DLL("ADVPACK.dll", "int RegSaveRestoreW(void*, char*, void*, char*, char*, char*, dword)")
# 呼び出し: RegSaveRestoreW(hWnd, pszTitleString, hkBckupKey, pcszRootKey, pcszSubKey, pcszValueName, dwFlags)
# hWnd : HWND -> "void*"
# pszTitleString : LPCWSTR -> "char*"
# hkBckupKey : HKEY -> "void*"
# pcszRootKey : LPCWSTR -> "char*"
# pcszSubKey : LPCWSTR -> "char*"
# pcszValueName : 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。