■ WTSRegisterSessionNotification/WTSRegisterSessionNotification API 함수를 사용해 잠금 화면 전환시 처리하는 방법을 보여준다.
▶ SessionNotification.cs
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namespace TestProject { /// <summary> /// 세션 통지 /// </summary> public enum SessionNotification { /// <summary> /// 잠금 /// </summary> Lock = 0, /// <summary> /// 잠금 취소 /// </summary> Unlock } } |
▶ SessionNotificationEventArgs.cs
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using System; namespace TestProject { /// <summary> /// 세션 통지 이벤트 인자 /// </summary> public class SessionNotificationEventArgs : EventArgs { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 세션 통지 /// </summary> private SessionNotification notification; /// <summary> /// 타임 스탬프 /// </summary> private DateTime timeStamp; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 세션 통지 - Notification /// <summary> /// 세션 통지 /// </summary> public SessionNotification Notification { get { return this.notification; } } #endregion #region 타임 스탬프 - TimeStamp /// <summary> /// 타임 스탬프 /// </summary> public DateTime TimeStamp { get { return this.timeStamp; } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - SessionNotificationEventArgs(notification) /// <summary> /// 생성자 /// </summary> /// <param name="notification">세션 통지</param> public SessionNotificationEventArgs(SessionNotification notification) { this.notification = notification; this.timeStamp = DateTime.Now; } #endregion } } |
▶ SessionNotificationHelper.cs
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using System; using System.Runtime.InteropServices; using System.Windows; using System.Windows.Interop; namespace TestProject { /// <summary> /// 세션 통지 헬퍼 /// </summary> public class SessionNotificationHelper : IDisposable { //////////////////////////////////////////////////////////////////////////////////////////////////// Import ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region WTS 세션 통지 등록하기 - WTSRegisterSessionNotification(windowHandle, flag) /// <summary> /// WTS 세션 통지 등록하기 /// </summary> /// <param name="windowHandle">윈도우 핸들</param> /// <param name="flag">플래그</param> /// <returns>처리 결과</returns> [DllImport("wtsapi32")] private static extern bool WTSRegisterSessionNotification(IntPtr windowHandle, int flag); #endregion #region WTS 세션 통지 등록 취소하기 - WTSUnRegisterSessionNotification(windowHandle) /// <summary> /// WTS 세션 통지 등록 취소하기 /// </summary> /// <param name="windowHandle">윈도우 핸들</param> /// <returns>처리 결과</returns> [DllImport("wtsapi32")] private static extern bool WTSUnRegisterSessionNotification(IntPtr windowHandle); #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Event ////////////////////////////////////////////////////////////////////////////////////////// Public #region 세션 변경시 이벤트 - SessionChanged /// <summary> /// 세션 변경시 이벤트 /// </summary> public event EventHandler<SessionNotificationEventArgs> SessionChanged; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// NOTIFY_FOR_THIS_SESSION /// </summary> private const int NOTIFY_FOR_THIS_SESSION = 0; /// <summary> /// SESSION_CHANGED /// </summary> private const int SESSION_CHANGED = 0x02B1; /// <summary> /// SESSION_LOCK /// </summary> private const int SESSION_LOCK = 0x7; /// <summary> /// SESSION_UNLOCK /// </summary> private const int SESSION_UNLOCK = 0x8; /// <summary> /// 등록 여부 /// </summary> private bool registered = false; /// <summary> /// 윈도우 인터롭 헬퍼 /// </summary> private WindowInteropHelper windowInteropHelper; /// <summary> /// 세션 잠금 마지막 시간 /// </summary> private DateTime lastTimeSessionLocked = DateTime.MinValue; /// <summary> /// 세션 잠금 취소 마지막 시간 /// </summary> private DateTime lastTimeSessionUnlocked = DateTime.MinValue; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Protected #region 이벤트 발생 가능 여부 - EnableRaisingEvents /// <summary> /// 이벤트 발생 가능 여부 /// </summary> protected bool EnableRaisingEvents { get { return this.registered; } set { bool haveXp = Environment.OSVersion.Platform == PlatformID.Win32NT && (Environment.OSVersion.Version.Major > 5 || (Environment.OSVersion.Version.Major == 5 && Environment.OSVersion.Version.Minor >= 1)); if(!haveXp) { this.registered = false; return; } if(value == true && !registered) { WTSRegisterSessionNotification(this.windowInteropHelper.Handle, NOTIFY_FOR_THIS_SESSION); this.registered = true; } else if(value == false && registered) { WTSUnRegisterSessionNotification(this.windowInteropHelper.Handle); this.registered = false; } } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - SessionNotificationHelper(window) /// <summary> /// 생성자 /// </summary> /// <param name="window">윈도우</param> public SessionNotificationHelper(Window window) { this.windowInteropHelper = new WindowInteropHelper(window); window.Loaded += window_Loaded; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Public //////////////////////////////////////////////////////////////////////////////// Function #region 리소스 해제하기 - Dispose() /// <summary> /// 리소스 해제하기 /// </summary> public void Dispose() { if(this.registered) { EnableRaisingEvents = false; } } #endregion ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 윈도우 로드시 처리하기 - window_Loaded(sender, e) /// <summary> /// 윈도우 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void window_Loaded(object sender, RoutedEventArgs e) { HwndSource windowHandleSource = HwndSource.FromHwnd(this.windowInteropHelper.Handle); windowHandleSource.AddHook(new HwndSourceHook(WndProc)); EnableRaisingEvents = true; } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 세션 잠금 처리하기 - ProcessSessionLock() /// <summary> /// 세션 잠금 처리하기 /// </summary> private void ProcessSessionLock() { DateTime currentTime = DateTime.Now; if(this.lastTimeSessionLocked == DateTime.MinValue) { this.lastTimeSessionLocked = currentTime; } else { TimeSpan elapsed = currentTime - this.lastTimeSessionLocked; this.lastTimeSessionLocked = currentTime; if(elapsed.TotalMilliseconds < 100) { return; } } if(SessionChanged != null) { SessionChanged(this, new SessionNotificationEventArgs(SessionNotification.Lock)); } } #endregion #region 세션 잠금 취소 처리하기 - ProcessSessionUnLock() /// <summary> /// 세션 잠금 취소 처리하기 /// </summary> private void ProcessSessionUnLock() { DateTime currentTime = DateTime.Now; if(this.lastTimeSessionUnlocked == DateTime.MinValue) { this.lastTimeSessionUnlocked = currentTime; } else { TimeSpan elapsed = currentTime - this.lastTimeSessionUnlocked; this.lastTimeSessionUnlocked = currentTime; if(elapsed.TotalMilliseconds < 100) { return; } } if(SessionChanged != null) { SessionChanged(this, new SessionNotificationEventArgs(SessionNotification.Unlock)); } } #endregion #region 윈도우 프로시저 처리하기 - WndProc(windowHandle, message, wordParameter, longParameter, handled) /// <summary> /// 윈도우 프로시저 처리하기 /// </summary> /// <param name="windowHandle">윈도우 핸들</param> /// <param name="message">메시지</param> /// <param name="wordParameter">WORD 매개 변수</param> /// <param name="longParameter">LONG 매개 변수</param> /// <param name="handled">처리 여부</param> /// <returns>처리 결과</returns> private IntPtr WndProc(IntPtr windowHandle, int message, IntPtr wordParameter, IntPtr longParameter, ref bool handled) { if(message == SESSION_CHANGED) { if(wordParameter.ToInt32() == SESSION_LOCK) { ProcessSessionLock(); } else if(wordParameter.ToInt32() == SESSION_UNLOCK) { ProcessSessionUnLock(); } } return IntPtr.Zero; } #endregion } } |
▶ MainWindow.xaml
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<Window x:Class="TestProject.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="800" Height="600" Title="WTSRegisterSessionNotification/WTSRegisterSessionNotification API 함수 : 잠금 화면 전환시 처리하기" FontFamily="나눔고딕코딩" FontSize="16"> <Grid Margin="10"> <TextBlock Name="textBlock" /> </Grid> </Window> |
▶ MainWindow.xaml.cs
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using System.Windows; namespace TestProject { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); SessionNotificationHelper helper = new SessionNotificationHelper(this); helper.SessionChanged += helper_SessionChanged; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 헬퍼 세션 변경시 처리하기 - helper_SessionChanged(sender, e) /// <summary> /// 헬퍼 세션 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void helper_SessionChanged(object sender, SessionNotificationEventArgs e) { this.textBlock.Text += string.Format("Recieved {0} notification at {1}\n", e.Notification, e.TimeStamp); } #endregion } } |
