InitiateShutdownA

// ADVAPI32.dll  (ANSI / -A)
#include <windows.h>

DWORD InitiateShutdownA(
    LPSTR lpMachineName,   // optional
    LPSTR lpMessage,   // optional
    DWORD dwGracePeriod,
    SHUTDOWN_FLAGS dwShutdownFlags,
    SHUTDOWN_REASON dwReason
);

<DllImport("ADVAPI32.dll", CharSet:=CharSet.Ansi, ExactSpelling:=True)>
Public Shared Function InitiateShutdownA(
    <MarshalAs(UnmanagedType.LPStr)> lpMachineName As String,   ' LPSTR optional
    <MarshalAs(UnmanagedType.LPStr)> lpMessage As String,   ' LPSTR optional
    dwGracePeriod As UInteger,   ' DWORD
    dwShutdownFlags As UInteger,   ' SHUTDOWN_FLAGS
    dwReason As UInteger   ' SHUTDOWN_REASON
) As UInteger
End Function

' lpMachineName : LPSTR optional
' lpMessage : LPSTR optional
' dwGracePeriod : DWORD
' dwShutdownFlags : SHUTDOWN_FLAGS
' dwReason : SHUTDOWN_REASON
Declare PtrSafe Function InitiateShutdownA Lib "advapi32" ( _
    ByVal lpMachineName As String, _
    ByVal lpMessage As String, _
    ByVal dwGracePeriod As Long, _
    ByVal dwShutdownFlags As Long, _
    ByVal dwReason As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

InitiateShutdownA = ctypes.windll.advapi32.InitiateShutdownA
InitiateShutdownA.restype = wintypes.DWORD
InitiateShutdownA.argtypes = [
    wintypes.LPCSTR,  # lpMachineName : LPSTR optional
    wintypes.LPCSTR,  # lpMessage : LPSTR optional
    wintypes.DWORD,  # dwGracePeriod : DWORD
    wintypes.DWORD,  # dwShutdownFlags : SHUTDOWN_FLAGS
    wintypes.DWORD,  # dwReason : SHUTDOWN_REASON
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('ADVAPI32.dll')
InitiateShutdownA = Fiddle::Function.new(
  lib['InitiateShutdownA'],
  [
    Fiddle::TYPE_VOIDP,  # lpMachineName : LPSTR optional
    Fiddle::TYPE_VOIDP,  # lpMessage : LPSTR optional
    -Fiddle::TYPE_INT,  # dwGracePeriod : DWORD
    -Fiddle::TYPE_INT,  # dwShutdownFlags : SHUTDOWN_FLAGS
    -Fiddle::TYPE_INT,  # dwReason : SHUTDOWN_REASON
  ],
  -Fiddle::TYPE_INT)

#[link(name = "advapi32")]
extern "system" {
    fn InitiateShutdownA(
        lpMachineName: *mut u8,  // LPSTR optional
        lpMessage: *mut u8,  // LPSTR optional
        dwGracePeriod: u32,  // DWORD
        dwShutdownFlags: u32,  // SHUTDOWN_FLAGS
        dwReason: u32  // SHUTDOWN_REASON
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("ADVAPI32.dll", CharSet = CharSet.Ansi)]
public static extern uint InitiateShutdownA([MarshalAs(UnmanagedType.LPStr)] string lpMachineName, [MarshalAs(UnmanagedType.LPStr)] string lpMessage, uint dwGracePeriod, uint dwShutdownFlags, uint dwReason);
"@
$api = Add-Type -MemberDefinition $sig -Name 'ADVAPI32_InitiateShutdownA' -Namespace Win32 -PassThru
# $api::InitiateShutdownA(lpMachineName, lpMessage, dwGracePeriod, dwShutdownFlags, dwReason)

#uselib "ADVAPI32.dll"
#func global InitiateShutdownA "InitiateShutdownA" sptr, sptr, sptr, sptr, sptr
; InitiateShutdownA lpMachineName, lpMessage, dwGracePeriod, dwShutdownFlags, dwReason   ; 戻り値は stat
; lpMachineName : LPSTR optional -> "sptr"
; lpMessage : LPSTR optional -> "sptr"
; dwGracePeriod : DWORD -> "sptr"
; dwShutdownFlags : SHUTDOWN_FLAGS -> "sptr"
; dwReason : SHUTDOWN_REASON -> "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 "ADVAPI32.dll"
#cfunc global InitiateShutdownA "InitiateShutdownA" str, str, int, int, int
; res = InitiateShutdownA(lpMachineName, lpMessage, dwGracePeriod, dwShutdownFlags, dwReason)
; lpMachineName : LPSTR optional -> "str"
; lpMessage : LPSTR optional -> "str"
; dwGracePeriod : DWORD -> "int"
; dwShutdownFlags : SHUTDOWN_FLAGS -> "int"
; dwReason : SHUTDOWN_REASON -> "int"

; DWORD InitiateShutdownA(LPSTR lpMachineName, LPSTR lpMessage, DWORD dwGracePeriod, SHUTDOWN_FLAGS dwShutdownFlags, SHUTDOWN_REASON dwReason)
#uselib "ADVAPI32.dll"
#cfunc global InitiateShutdownA "InitiateShutdownA" str, str, int, int, int
; res = InitiateShutdownA(lpMachineName, lpMessage, dwGracePeriod, dwShutdownFlags, dwReason)
; lpMachineName : LPSTR optional -> "str"
; lpMessage : LPSTR optional -> "str"
; dwGracePeriod : DWORD -> "int"
; dwShutdownFlags : SHUTDOWN_FLAGS -> "int"
; dwReason : SHUTDOWN_REASON -> "int"

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

var (
	advapi32 = windows.NewLazySystemDLL("ADVAPI32.dll")
	procInitiateShutdownA = advapi32.NewProc("InitiateShutdownA")
)

// lpMachineName (LPSTR optional), lpMessage (LPSTR optional), dwGracePeriod (DWORD), dwShutdownFlags (SHUTDOWN_FLAGS), dwReason (SHUTDOWN_REASON)
r1, _, err := procInitiateShutdownA.Call(
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpMachineName))),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(lpMessage))),
	uintptr(dwGracePeriod),
	uintptr(dwShutdownFlags),
	uintptr(dwReason),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function InitiateShutdownA(
  lpMachineName: PAnsiChar;   // LPSTR optional
  lpMessage: PAnsiChar;   // LPSTR optional
  dwGracePeriod: DWORD;   // DWORD
  dwShutdownFlags: DWORD;   // SHUTDOWN_FLAGS
  dwReason: DWORD   // SHUTDOWN_REASON
): DWORD; stdcall;
  external 'ADVAPI32.dll' name 'InitiateShutdownA';

result := DllCall("ADVAPI32\InitiateShutdownA"
    , "AStr", lpMachineName   ; LPSTR optional
    , "AStr", lpMessage   ; LPSTR optional
    , "UInt", dwGracePeriod   ; DWORD
    , "UInt", dwShutdownFlags   ; SHUTDOWN_FLAGS
    , "UInt", dwReason   ; SHUTDOWN_REASON
    , "UInt")   ; return: DWORD

●InitiateShutdownA(lpMachineName, lpMessage, dwGracePeriod, dwShutdownFlags, dwReason) = DLL("ADVAPI32.dll", "dword InitiateShutdownA(char*, char*, dword, dword, dword)")
# 呼び出し: InitiateShutdownA(lpMachineName, lpMessage, dwGracePeriod, dwShutdownFlags, dwReason)
# lpMachineName : LPSTR optional -> "char*"
# lpMessage : LPSTR optional -> "char*"
# dwGracePeriod : DWORD -> "dword"
# dwShutdownFlags : SHUTDOWN_FLAGS -> "dword"
# 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)。