ホーム › UI.WindowsAndMessaging › UnregisterDeviceNotification

UnregisterDeviceNotification

関数

デバイス変更通知の登録を解除する。

DLLUSER32.dll呼出規約winapiSetLastErrorあり対応OSWindows XP 以降

シグネチャ

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

BOOL UnregisterDeviceNotification(
    HDEVNOTIFY Handle
);

パラメーター

名前	型	方向
Handle	HDEVNOTIFY	in

戻り値の型: BOOL

各言語での呼び出し定義

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

BOOL UnregisterDeviceNotification(
    HDEVNOTIFY Handle
);

[return: MarshalAs(UnmanagedType.Bool)]
[DllImport("USER32.dll", SetLastError = true, ExactSpelling = true)]
static extern bool UnregisterDeviceNotification(
    IntPtr Handle   // HDEVNOTIFY
);

<DllImport("USER32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function UnregisterDeviceNotification(
    Handle As IntPtr   ' HDEVNOTIFY
) As Boolean
End Function

' Handle : HDEVNOTIFY
Declare PtrSafe Function UnregisterDeviceNotification Lib "user32" ( _
    ByVal Handle As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

UnregisterDeviceNotification = ctypes.windll.user32.UnregisterDeviceNotification
UnregisterDeviceNotification.restype = wintypes.BOOL
UnregisterDeviceNotification.argtypes = [
    wintypes.HANDLE,  # Handle : HDEVNOTIFY
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('USER32.dll')
UnregisterDeviceNotification = Fiddle::Function.new(
  lib['UnregisterDeviceNotification'],
  [
    Fiddle::TYPE_VOIDP,  # Handle : HDEVNOTIFY
  ],
  Fiddle::TYPE_INT)

#[link(name = "user32")]
extern "system" {
    fn UnregisterDeviceNotification(
        Handle: *mut core::ffi::c_void  // HDEVNOTIFY
    ) -> 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 UnregisterDeviceNotification(IntPtr Handle);
"@
$api = Add-Type -MemberDefinition $sig -Name 'USER32_UnregisterDeviceNotification' -Namespace Win32 -PassThru
# $api::UnregisterDeviceNotification(Handle)

#uselib "USER32.dll"
#func global UnregisterDeviceNotification "UnregisterDeviceNotification" sptr
; UnregisterDeviceNotification Handle   ; 戻り値は stat
; Handle : HDEVNOTIFY -> "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 UnregisterDeviceNotification "UnregisterDeviceNotification" sptr
; res = UnregisterDeviceNotification(Handle)
; Handle : HDEVNOTIFY -> "sptr"

; BOOL UnregisterDeviceNotification(HDEVNOTIFY Handle)
#uselib "USER32.dll"
#cfunc global UnregisterDeviceNotification "UnregisterDeviceNotification" intptr
; res = UnregisterDeviceNotification(Handle)
; Handle : HDEVNOTIFY -> "intptr"

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

var (
	user32 = windows.NewLazySystemDLL("USER32.dll")
	procUnregisterDeviceNotification = user32.NewProc("UnregisterDeviceNotification")
)

// Handle (HDEVNOTIFY)
r1, _, err := procUnregisterDeviceNotification.Call(
	uintptr(Handle),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // BOOL

function UnregisterDeviceNotification(
  Handle: THandle   // HDEVNOTIFY
): BOOL; stdcall;
  external 'USER32.dll' name 'UnregisterDeviceNotification';

result := DllCall("USER32\UnregisterDeviceNotification"
    , "Ptr", Handle   ; HDEVNOTIFY
    , "Int")   ; return: BOOL

●UnregisterDeviceNotification(Handle) = DLL("USER32.dll", "bool UnregisterDeviceNotification(void*)")
# 呼び出し: UnregisterDeviceNotification(Handle)
# Handle : HDEVNOTIFY -> "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)。