SHMessageBoxCheckW

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

INT SHMessageBoxCheckW(
    HWND hwnd,   // optional
    LPCWSTR pszText,
    LPCWSTR pszCaption,
    DWORD uType,
    INT iDefault,
    LPCWSTR pszRegVal
);

<DllImport("SHLWAPI.dll", CharSet:=CharSet.Unicode, ExactSpelling:=True)>
Public Shared Function SHMessageBoxCheckW(
    hwnd As IntPtr,   ' HWND optional
    <MarshalAs(UnmanagedType.LPWStr)> pszText As String,   ' LPCWSTR
    <MarshalAs(UnmanagedType.LPWStr)> pszCaption As String,   ' LPCWSTR
    uType As UInteger,   ' DWORD
    iDefault As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPWStr)> pszRegVal As String   ' LPCWSTR
) As Integer
End Function

' hwnd : HWND optional
' pszText : LPCWSTR
' pszCaption : LPCWSTR
' uType : DWORD
' iDefault : INT
' pszRegVal : LPCWSTR
Declare PtrSafe Function SHMessageBoxCheckW Lib "shlwapi" ( _
    ByVal hwnd As LongPtr, _
    ByVal pszText As LongPtr, _
    ByVal pszCaption As LongPtr, _
    ByVal uType As Long, _
    ByVal iDefault As Long, _
    ByVal pszRegVal As LongPtr) 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

SHMessageBoxCheckW = ctypes.windll.shlwapi.SHMessageBoxCheckW
SHMessageBoxCheckW.restype = ctypes.c_int
SHMessageBoxCheckW.argtypes = [
    wintypes.HANDLE,  # hwnd : HWND optional
    wintypes.LPCWSTR,  # pszText : LPCWSTR
    wintypes.LPCWSTR,  # pszCaption : LPCWSTR
    wintypes.DWORD,  # uType : DWORD
    ctypes.c_int,  # iDefault : INT
    wintypes.LPCWSTR,  # pszRegVal : LPCWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('SHLWAPI.dll')
SHMessageBoxCheckW = Fiddle::Function.new(
  lib['SHMessageBoxCheckW'],
  [
    Fiddle::TYPE_VOIDP,  # hwnd : HWND optional
    Fiddle::TYPE_VOIDP,  # pszText : LPCWSTR
    Fiddle::TYPE_VOIDP,  # pszCaption : LPCWSTR
    -Fiddle::TYPE_INT,  # uType : DWORD
    Fiddle::TYPE_INT,  # iDefault : INT
    Fiddle::TYPE_VOIDP,  # pszRegVal : LPCWSTR
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "shlwapi")]
extern "system" {
    fn SHMessageBoxCheckW(
        hwnd: *mut core::ffi::c_void,  // HWND optional
        pszText: *const u16,  // LPCWSTR
        pszCaption: *const u16,  // LPCWSTR
        uType: u32,  // DWORD
        iDefault: i32,  // INT
        pszRegVal: *const u16  // LPCWSTR
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("SHLWAPI.dll", CharSet = CharSet.Unicode)]
public static extern int SHMessageBoxCheckW(IntPtr hwnd, [MarshalAs(UnmanagedType.LPWStr)] string pszText, [MarshalAs(UnmanagedType.LPWStr)] string pszCaption, uint uType, int iDefault, [MarshalAs(UnmanagedType.LPWStr)] string pszRegVal);
"@
$api = Add-Type -MemberDefinition $sig -Name 'SHLWAPI_SHMessageBoxCheckW' -Namespace Win32 -PassThru
# $api::SHMessageBoxCheckW(hwnd, pszText, pszCaption, uType, iDefault, pszRegVal)

#uselib "SHLWAPI.dll"
#func global SHMessageBoxCheckW "SHMessageBoxCheckW" wptr, wptr, wptr, wptr, wptr, wptr
; SHMessageBoxCheckW hwnd, pszText, pszCaption, uType, iDefault, pszRegVal   ; 戻り値は stat
; hwnd : HWND optional -> "wptr"
; pszText : LPCWSTR -> "wptr"
; pszCaption : LPCWSTR -> "wptr"
; uType : DWORD -> "wptr"
; iDefault : INT -> "wptr"
; pszRegVal : LPCWSTR -> "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 "SHLWAPI.dll"
#cfunc global SHMessageBoxCheckW "SHMessageBoxCheckW" sptr, wstr, wstr, int, int, wstr
; res = SHMessageBoxCheckW(hwnd, pszText, pszCaption, uType, iDefault, pszRegVal)
; hwnd : HWND optional -> "sptr"
; pszText : LPCWSTR -> "wstr"
; pszCaption : LPCWSTR -> "wstr"
; uType : DWORD -> "int"
; iDefault : INT -> "int"
; pszRegVal : LPCWSTR -> "wstr"

; INT SHMessageBoxCheckW(HWND hwnd, LPCWSTR pszText, LPCWSTR pszCaption, DWORD uType, INT iDefault, LPCWSTR pszRegVal)
#uselib "SHLWAPI.dll"
#cfunc global SHMessageBoxCheckW "SHMessageBoxCheckW" intptr, wstr, wstr, int, int, wstr
; res = SHMessageBoxCheckW(hwnd, pszText, pszCaption, uType, iDefault, pszRegVal)
; hwnd : HWND optional -> "intptr"
; pszText : LPCWSTR -> "wstr"
; pszCaption : LPCWSTR -> "wstr"
; uType : DWORD -> "int"
; iDefault : INT -> "int"
; pszRegVal : LPCWSTR -> "wstr"

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

var (
	shlwapi = windows.NewLazySystemDLL("SHLWAPI.dll")
	procSHMessageBoxCheckW = shlwapi.NewProc("SHMessageBoxCheckW")
)

// hwnd (HWND optional), pszText (LPCWSTR), pszCaption (LPCWSTR), uType (DWORD), iDefault (INT), pszRegVal (LPCWSTR)
r1, _, err := procSHMessageBoxCheckW.Call(
	uintptr(hwnd),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszText))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszCaption))),
	uintptr(uType),
	uintptr(iDefault),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(pszRegVal))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function SHMessageBoxCheckW(
  hwnd: THandle;   // HWND optional
  pszText: PWideChar;   // LPCWSTR
  pszCaption: PWideChar;   // LPCWSTR
  uType: DWORD;   // DWORD
  iDefault: Integer;   // INT
  pszRegVal: PWideChar   // LPCWSTR
): Integer; stdcall;
  external 'SHLWAPI.dll' name 'SHMessageBoxCheckW';

result := DllCall("SHLWAPI\SHMessageBoxCheckW"
    , "Ptr", hwnd   ; HWND optional
    , "WStr", pszText   ; LPCWSTR
    , "WStr", pszCaption   ; LPCWSTR
    , "UInt", uType   ; DWORD
    , "Int", iDefault   ; INT
    , "WStr", pszRegVal   ; LPCWSTR
    , "Int")   ; return: INT

●SHMessageBoxCheckW(hwnd, pszText, pszCaption, uType, iDefault, pszRegVal) = DLL("SHLWAPI.dll", "int SHMessageBoxCheckW(void*, char*, char*, dword, int, char*)")
# 呼び出し: SHMessageBoxCheckW(hwnd, pszText, pszCaption, uType, iDefault, pszRegVal)
# hwnd : HWND optional -> "void*"
# pszText : LPCWSTR -> "char*"
# pszCaption : LPCWSTR -> "char*"
# uType : DWORD -> "dword"
# iDefault : INT -> "int"
# pszRegVal : LPCWSTR -> "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)。
# ※-W(Unicode)関数。なでしこ1はANSIのため -A 版の利用を推奨。