ShutdownBlockReasonQuery

// USER32.dll
#include <windows.h>

BOOL ShutdownBlockReasonQuery(
    HWND hWnd,
    LPWSTR pwszBuff,   // optional
    DWORD* pcchBuff
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function ShutdownBlockReasonQuery(
    hWnd As IntPtr,   ' HWND
    <MarshalAs(UnmanagedType.LPWStr)> pwszBuff As System.Text.StringBuilder,   ' LPWSTR optional, out
    ByRef pcchBuff As UInteger   ' DWORD* in/out
) As Boolean
End Function

' hWnd : HWND
' pwszBuff : LPWSTR optional, out
' pcchBuff : DWORD* in/out
Declare PtrSafe Function ShutdownBlockReasonQuery Lib "user32" ( _
    ByVal hWnd As LongPtr, _
    ByVal pwszBuff As LongPtr, _
    ByRef pcchBuff 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

ShutdownBlockReasonQuery = ctypes.windll.user32.ShutdownBlockReasonQuery
ShutdownBlockReasonQuery.restype = wintypes.BOOL
ShutdownBlockReasonQuery.argtypes = [
    wintypes.HANDLE,  # hWnd : HWND
    wintypes.LPWSTR,  # pwszBuff : LPWSTR optional, out
    ctypes.POINTER(wintypes.DWORD),  # pcchBuff : DWORD* in/out
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
ShutdownBlockReasonQuery = Fiddle::Function.new(
  lib['ShutdownBlockReasonQuery'],
  [
    Fiddle::TYPE_VOIDP,  # hWnd : HWND
    Fiddle::TYPE_VOIDP,  # pwszBuff : LPWSTR optional, out
    Fiddle::TYPE_VOIDP,  # pcchBuff : DWORD* in/out
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn ShutdownBlockReasonQuery(
        hWnd: *mut core::ffi::c_void,  // HWND
        pwszBuff: *mut u16,  // LPWSTR optional, out
        pcchBuff: *mut u32  // DWORD* in/out
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true)]
public static extern bool ShutdownBlockReasonQuery(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)] System.Text.StringBuilder pwszBuff, ref uint pcchBuff);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_ShutdownBlockReasonQuery' -Namespace Win32 -PassThru
# $api::ShutdownBlockReasonQuery(hWnd, pwszBuff, pcchBuff)

#uselib "USER32.dll"
#func global ShutdownBlockReasonQuery "ShutdownBlockReasonQuery" sptr, sptr, sptr
; ShutdownBlockReasonQuery hWnd, varptr(pwszBuff), varptr(pcchBuff)   ; 戻り値は stat
; hWnd : HWND -> "sptr"
; pwszBuff : LPWSTR optional, out -> "sptr"
; pcchBuff : DWORD* in/out -> "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 "USER32.dll"
#cfunc global ShutdownBlockReasonQuery "ShutdownBlockReasonQuery" sptr, var, var
; res = ShutdownBlockReasonQuery(hWnd, pwszBuff, pcchBuff)
; hWnd : HWND -> "sptr"
; pwszBuff : LPWSTR optional, out -> "var"
; pcchBuff : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; BOOL ShutdownBlockReasonQuery(HWND hWnd, LPWSTR pwszBuff, DWORD* pcchBuff)
#uselib "USER32.dll"
#cfunc global ShutdownBlockReasonQuery "ShutdownBlockReasonQuery" intptr, var, var
; res = ShutdownBlockReasonQuery(hWnd, pwszBuff, pcchBuff)
; hWnd : HWND -> "intptr"
; pwszBuff : LPWSTR optional, out -> "var"
; pcchBuff : DWORD* in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procShutdownBlockReasonQuery = user32.NewProc("ShutdownBlockReasonQuery")
)

// hWnd (HWND), pwszBuff (LPWSTR optional, out), pcchBuff (DWORD* in/out)
r1, _, err := procShutdownBlockReasonQuery.Call(
	uintptr(hWnd),
	uintptr(pwszBuff),
	uintptr(pcchBuff),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function ShutdownBlockReasonQuery(
  hWnd: THandle;   // HWND
  pwszBuff: PWideChar;   // LPWSTR optional, out
  pcchBuff: Pointer   // DWORD* in/out
): BOOL; stdcall;
  external 'USER32.dll' name 'ShutdownBlockReasonQuery';

result := DllCall("USER32\ShutdownBlockReasonQuery"
    , "Ptr", hWnd   ; HWND
    , "Ptr", pwszBuff   ; LPWSTR optional, out
    , "Ptr", pcchBuff   ; DWORD* in/out
    , "Int")   ; return: BOOL

●ShutdownBlockReasonQuery(hWnd, pwszBuff, pcchBuff) = DLL("USER32.dll", "bool ShutdownBlockReasonQuery(void*, char*, void*)")
# 呼び出し: ShutdownBlockReasonQuery(hWnd, pwszBuff, pcchBuff)
# hWnd : HWND -> "void*"
# pwszBuff : LPWSTR optional, out -> "char*"
# pcchBuff : DWORD* in/out -> "void*"
# 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)。