Полный рабочий код C # для приложения WPF, показывающий, как прослушивать события открытия / закрытия крышки:
using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows;
using System.Windows.Interop;
namespace WpfApplication1
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
[DllImport(@"User32", SetLastError = true, EntryPoint = "RegisterPowerSettingNotification",
CallingConvention = CallingConvention.StdCall)]
private static extern IntPtr RegisterPowerSettingNotification(IntPtr hRecipient, ref Guid PowerSettingGuid,
Int32 Flags);
internal struct POWERBROADCAST_SETTING
{
public Guid PowerSetting;
public uint DataLength;
public byte Data;
}
Guid GUID_LIDSWITCH_STATE_CHANGE = new Guid(0xBA3E0F4D, 0xB817, 0x4094, 0xA2, 0xD1, 0xD5, 0x63, 0x79, 0xE6, 0xA0, 0xF3);
const int DEVICE_NOTIFY_WINDOW_HANDLE = 0x00000000;
const int WM_POWERBROADCAST = 0x0218;
const int PBT_POWERSETTINGCHANGE = 0x8013;
private bool? _previousLidState = null;
public MainWindow()
{
InitializeComponent();
this.SourceInitialized += MainWindow_SourceInitialized;
}
void MainWindow_SourceInitialized(object sender, EventArgs e)
{
RegisterForPowerNotifications();
IntPtr hwnd = new WindowInteropHelper(this).Handle;
HwndSource.FromHwnd(hwnd).AddHook(new HwndSourceHook(WndProc));
}
private void RegisterForPowerNotifications()
{
IntPtr handle = new WindowInteropHelper(Application.Current.Windows[0]).Handle;
IntPtr hLIDSWITCHSTATECHANGE = RegisterPowerSettingNotification(handle,
ref GUID_LIDSWITCH_STATE_CHANGE,
DEVICE_NOTIFY_WINDOW_HANDLE);
}
IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled)
{
switch (msg)
{
case WM_POWERBROADCAST:
OnPowerBroadcast(wParam, lParam);
break;
default:
break;
}
return IntPtr.Zero;
}
private void OnPowerBroadcast(IntPtr wParam, IntPtr lParam)
{
if ((int)wParam == PBT_POWERSETTINGCHANGE)
{
POWERBROADCAST_SETTING ps = (POWERBROADCAST_SETTING)Marshal.PtrToStructure(lParam, typeof(POWERBROADCAST_SETTING));
IntPtr pData = (IntPtr)((int)lParam + Marshal.SizeOf(ps));
Int32 iData = (Int32)Marshal.PtrToStructure(pData, typeof(Int32));
if (ps.PowerSetting == GUID_LIDSWITCH_STATE_CHANGE)
{
bool isLidOpen = ps.Data != 0;
if (!isLidOpen == _previousLidState)
{
LidStatusChanged(isLidOpen);
}
_previousLidState = isLidOpen;
}
}
}
private void LidStatusChanged(bool isLidOpen)
{
if (isLidOpen)
{
//Do some action on lid open event
Debug.WriteLine("{0}: Lid opened!", DateTime.Now);
}
else
{
//Do some action on lid close event
Debug.WriteLine("{0}: Lid closed!", DateTime.Now);
}
}
}
}