InitiateSystemShutdownExW

// ADVAPI32.dll  (Unicode / -W)
#include <windows.h>

BOOL InitiateSystemShutdownExW(
    LPWSTR lpMachineName,   // optional
    LPWSTR lpMessage,   // optional
    DWORD dwTimeout,
    BOOL bForceAppsClosed,
    BOOL bRebootAfterShutdown,
    SHUTDOWN_REASON dwReason
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Unicode, SetLastError:=True, ExactSpelling:=True)>
Public Shared Function InitiateSystemShutdownExW(
    <MarshalAs(UnmanagedType.LPWStr)> lpMachineName As String,   ' LPWSTR optional
    <MarshalAs(UnmanagedType.LPWStr)> lpMessage As String,   ' LPWSTR optional
    dwTimeout As UInteger,   ' DWORD
    bForceAppsClosed As Boolean,   ' BOOL
    bRebootAfterShutdown As Boolean,   ' BOOL
    dwReason As UInteger   ' SHUTDOWN_REASON
) As Boolean
End Function

' lpMachineName : LPWSTR optional
' lpMessage : LPWSTR optional
' dwTimeout : DWORD
' bForceAppsClosed : BOOL
' bRebootAfterShutdown : BOOL
' dwReason : SHUTDOWN_REASON
Declare PtrSafe Function InitiateSystemShutdownExW Lib "advapi32" ( _
    ByVal lpMachineName As LongPtr, _
    ByVal lpMessage As LongPtr, _
    ByVal dwTimeout As Long, _
    ByVal bForceAppsClosed As Long, _
    ByVal bRebootAfterShutdown As Long, _
    ByVal dwReason 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

InitiateSystemShutdownExW = ctypes.windll.advapi32.InitiateSystemShutdownExW
InitiateSystemShutdownExW.restype = wintypes.BOOL
InitiateSystemShutdownExW.argtypes = [
    wintypes.LPCWSTR,  # lpMachineName : LPWSTR optional
    wintypes.LPCWSTR,  # lpMessage : LPWSTR optional
    wintypes.DWORD,  # dwTimeout : DWORD
    wintypes.BOOL,  # bForceAppsClosed : BOOL
    wintypes.BOOL,  # bRebootAfterShutdown : BOOL
    wintypes.DWORD,  # dwReason : SHUTDOWN_REASON
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
InitiateSystemShutdownExW = Fiddle::Function.new(
  lib['InitiateSystemShutdownExW'],
  [
    Fiddle::TYPE_VOIDP,  # lpMachineName : LPWSTR optional
    Fiddle::TYPE_VOIDP,  # lpMessage : LPWSTR optional
    -Fiddle::TYPE_INT,  # dwTimeout : DWORD
    Fiddle::TYPE_INT,  # bForceAppsClosed : BOOL
    Fiddle::TYPE_INT,  # bRebootAfterShutdown : BOOL
    -Fiddle::TYPE_INT,  # dwReason : SHUTDOWN_REASON
  ],
  Fiddle::TYPE_INT)
# Wide strings: pass str.encode("UTF-16LE") + "\x00\x00"

#[link(name = "advapi32")]
extern "system" {
    fn InitiateSystemShutdownExW(
        lpMachineName: *mut u16,  // LPWSTR optional
        lpMessage: *mut u16,  // LPWSTR optional
        dwTimeout: u32,  // DWORD
        bForceAppsClosed: i32,  // BOOL
        bRebootAfterShutdown: i32,  // BOOL
        dwReason: u32  // SHUTDOWN_REASON
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("ADVAPI32.dll", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern bool InitiateSystemShutdownExW([MarshalAs(UnmanagedType.LPWStr)] string lpMachineName, [MarshalAs(UnmanagedType.LPWStr)] string lpMessage, uint dwTimeout, bool bForceAppsClosed, bool bRebootAfterShutdown, uint dwReason);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_InitiateSystemShutdownExW' -Namespace Win32 -PassThru
# $api::InitiateSystemShutdownExW(lpMachineName, lpMessage, dwTimeout, bForceAppsClosed, bRebootAfterShutdown, dwReason)

#uselib "ADVAPI32.dll"
#func global InitiateSystemShutdownExW "InitiateSystemShutdownExW" wptr, wptr, wptr, wptr, wptr, wptr
; InitiateSystemShutdownExW lpMachineName, lpMessage, dwTimeout, bForceAppsClosed, bRebootAfterShutdown, dwReason   ; 戻り値は stat
; lpMachineName : LPWSTR optional -> "wptr"
; lpMessage : LPWSTR optional -> "wptr"
; dwTimeout : DWORD -> "wptr"
; bForceAppsClosed : BOOL -> "wptr"
; bRebootAfterShutdown : BOOL -> "wptr"
; dwReason : SHUTDOWN_REASON -> "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 "ADVAPI32.dll"
#cfunc global InitiateSystemShutdownExW "InitiateSystemShutdownExW" wstr, wstr, int, int, int, int
; res = InitiateSystemShutdownExW(lpMachineName, lpMessage, dwTimeout, bForceAppsClosed, bRebootAfterShutdown, dwReason)
; lpMachineName : LPWSTR optional -> "wstr"
; lpMessage : LPWSTR optional -> "wstr"
; dwTimeout : DWORD -> "int"
; bForceAppsClosed : BOOL -> "int"
; bRebootAfterShutdown : BOOL -> "int"
; dwReason : SHUTDOWN_REASON -> "int"

; BOOL InitiateSystemShutdownExW(LPWSTR lpMachineName, LPWSTR lpMessage, DWORD dwTimeout, BOOL bForceAppsClosed, BOOL bRebootAfterShutdown, SHUTDOWN_REASON dwReason)
#uselib "ADVAPI32.dll"
#cfunc global InitiateSystemShutdownExW "InitiateSystemShutdownExW" wstr, wstr, int, int, int, int
; res = InitiateSystemShutdownExW(lpMachineName, lpMessage, dwTimeout, bForceAppsClosed, bRebootAfterShutdown, dwReason)
; lpMachineName : LPWSTR optional -> "wstr"
; lpMessage : LPWSTR optional -> "wstr"
; dwTimeout : DWORD -> "int"
; bForceAppsClosed : BOOL -> "int"
; bRebootAfterShutdown : BOOL -> "int"
; dwReason : SHUTDOWN_REASON -> "int"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procInitiateSystemShutdownExW = advapi32.NewProc("InitiateSystemShutdownExW")
)

// lpMachineName (LPWSTR optional), lpMessage (LPWSTR optional), dwTimeout (DWORD), bForceAppsClosed (BOOL), bRebootAfterShutdown (BOOL), dwReason (SHUTDOWN_REASON)
r1, _, err := procInitiateSystemShutdownExW.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpMachineName))),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(lpMessage))),
	uintptr(dwTimeout),
	uintptr(bForceAppsClosed),
	uintptr(bRebootAfterShutdown),
	uintptr(dwReason),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function InitiateSystemShutdownExW(
  lpMachineName: PWideChar;   // LPWSTR optional
  lpMessage: PWideChar;   // LPWSTR optional
  dwTimeout: DWORD;   // DWORD
  bForceAppsClosed: BOOL;   // BOOL
  bRebootAfterShutdown: BOOL;   // BOOL
  dwReason: DWORD   // SHUTDOWN_REASON
): BOOL; stdcall;
  external 'ADVAPI32.dll' name 'InitiateSystemShutdownExW';

result := DllCall("ADVAPI32\InitiateSystemShutdownExW"
    , "WStr", lpMachineName   ; LPWSTR optional
    , "WStr", lpMessage   ; LPWSTR optional
    , "UInt", dwTimeout   ; DWORD
    , "Int", bForceAppsClosed   ; BOOL
    , "Int", bRebootAfterShutdown   ; BOOL
    , "UInt", dwReason   ; SHUTDOWN_REASON
    , "Int")   ; return: BOOL

●InitiateSystemShutdownExW(lpMachineName, lpMessage, dwTimeout, bForceAppsClosed, bRebootAfterShutdown, dwReason) = DLL("ADVAPI32.dll", "bool InitiateSystemShutdownExW(char*, char*, dword, bool, bool, dword)")
# 呼び出し: InitiateSystemShutdownExW(lpMachineName, lpMessage, dwTimeout, bForceAppsClosed, bRebootAfterShutdown, dwReason)
# lpMachineName : LPWSTR optional -> "char*"
# lpMessage : LPWSTR optional -> "char*"
# dwTimeout : DWORD -> "dword"
# bForceAppsClosed : BOOL -> "bool"
# bRebootAfterShutdown : BOOL -> "bool"
# dwReason : SHUTDOWN_REASON -> "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。