csharp 利用SetWinEventHook事件钩子避免SetWindowsHookEx权限问题

Posted 2021-05-12

    internal static class AccessibleEventHelper    {        public static event AccessibleEventHandler EventOccurred;        private static AccessibleEventType min = AccessibleEventType.EVENT_MIN;        private static AccessibleEventType max = AccessibleEventType.EVENT_MAX;        private static IntPtr handle = IntPtr.Zero;        private static WinEventDelegate internalDelegate;        private static GCHandle gch;        [DllImport("user32.dll")]        private static extern IntPtr SetWinEventHook(AccessibleEventType eventMin, AccessibleEventType eventMax, IntPtr hmodWinEventProc, WinEventDelegate lpfnWinEventProc, uint idProcess, uint idThread, uint dwFlags);        [DllImport("user32.dll")]        private static extern bool UnhookWinEvent(IntPtr hWinEventHook);        private delegate void WinEventDelegate(IntPtr hWinEventHook, AccessibleEventType eventType, IntPtr hwnd, uint idObject, uint idChild, uint dwEventThread, uint dwmsEventTime);        public static void Init()        {            internalDelegate = new WinEventDelegate(InternalCallback);            gch = GCHandle.Alloc(internalDelegate);            handle = SetWinEventHook(min, max, IntPtr.Zero, internalDelegate, 0, 0, 0);        }        public static void UnInit()        {            UnhookWinEvent(handle);            handle = IntPtr.Zero;            try            {                gch.Free();            }            catch { }        }        private static void InternalCallback(IntPtr hWinEventHook, AccessibleEventType eventType, IntPtr hwnd, uint idObject, uint idChild, uint dwEventThread, uint dwmsEventTime)        {            if (hWinEventHook != handle) return;            AccessibleEventArgs aea = new AccessibleEventArgs(eventType, hwnd, idObject, idChild, dwEventThread, dwmsEventTime);            if (EventOccurred != null)                EventOccurred(null, aea);        }    }    internal delegate void AccessibleEventHandler(object sender, AccessibleEventArgs e);    internal class AccessibleEventArgs : EventArgs    {        private AccessibleEventType eventType;        private IntPtr hWnd;        private uint idObject;        private uint idChild;        private uint dwEventThread;        private uint dwmsEventTime;        /// <summary>        /// Initializes a new instance of the AccessibleEventArgs class.        /// </summary>        public AccessibleEventArgs(AccessibleEventType eventType,            IntPtr hwnd, uint idObject, uint idChild, uint dwEventThread, uint dwmsEventTime)        {            this.eventType = eventType;            this.hWnd = hwnd;            this.idObject = idObject;            this.idChild = idChild;            this.dwEventThread = dwEventThread;            this.dwmsEventTime = dwmsEventTime;        }        /// <summary>        /// Type of this accessible event        /// </summary>        public AccessibleEventType EventType        {            get { return eventType; }        }        /// <summary>        /// Handle of the affected window, if any.        /// </summary>        public IntPtr HWnd        {            get { return hWnd; }        }        /// <summary>        /// Object ID.        /// </summary>        public uint ObjectID        {            get { return idObject; }        }        /// <summary>        /// Child ID.        /// </summary>        public uint ChildID        {            get { return idChild; }        }        /// <summary>        /// The thread that generated this event.        /// </summary>        public uint Thread        {            get { return dwEventThread; }        }        /// <summary>        /// Time in milliseconds when the event was generated.        /// </summary>        public uint Time        {            get { return dwmsEventTime; }        }    }