using System;using ponentModel;using System.Reflection;using System.Runtime.InteropServices;using System.Windows.Forms;namespace UserActivityMonitor{///<summary>///This class monitors all mouse activities globally (also outside of the application)///and provides appropriate events.///</summary>public static class HookManager{///<summary>///Occurs when the mouse pointer is moved.///</summary>public static event MouseEventHandler MouseMove{add{EnsureSubscribedToGlobalMouseEvents();s_MouseMove += value;}remove{s_MouseMove -= value;TryUnsubscribeFromGlobalMouseEvents();}}///<summary>///Occurs when a click was performed by the mouse.///</summary>public static event MouseEventHandler MouseClick{add{EnsureSubscribedToGlobalMouseEvents();s_MouseClick += value;}remove{s_MouseClick -= value;TryUnsubscribeFromGlobalMouseEvents();}}///<summary>///Occurs when the mouse a mouse button is pressed.///</summary>public static event MouseEventHandler MouseDown{add{EnsureSubscribedToGlobalMouseEvents();s_MouseDown += value;}remove{s_MouseDown -= value;TryUnsubscribeFromGlobalMouseEvents();}}///<summary>///Occurs when a mouse button is released.///</summary>public static event MouseEventHandler MouseUp{add{EnsureSubscribedToGlobalMouseEvents();s_MouseUp += value;}remove{s_MouseUp -= value;TryUnsubscribeFromGlobalMouseEvents();}}///<summary>///Occurs when the mouse wheel moves.///</summary>public static event MouseEventHandler MouseWheel {add{EnsureSubscribedToGlobalMouseEvents();s_MouseWheel += value;}remove{s_MouseWheel -= value;TryUnsubscribeFromGlobalMouseEvents();}}///<summary>///Occurs when a double clicked was performed by the mouse.///</summary>public static event MouseEventHandler MouseDoubleClick{add{EnsureSubscribedToGlobalMouseEvents();if (s_MouseDoubleClick == null){s_DoubleClickTimer = new Timer{Interval = GetDoubleClickTime(),Enabled = false };s_DoubleClickTimer.Tick += DoubleClickTimeElapsed; MouseUp += OnMouseUp;}s_MouseDoubleClick += value;}remove{if (s_MouseDoubleClick != null){s_MouseDoubleClick -= value;if (s_MouseDoubleClick == null){MouseUp -= OnMouseUp;s_DoubleClickTimer.Tick -= DoubleClickTimeElapsed; s_DoubleClickTimer = null;}}TryUnsubscribeFromGlobalMouseEvents();}}///<summary>///Occurs when a key is released.///</summary>public static event KeyEventHandler KeyUp{add{EnsureSubscribedToGlobalKeyboardEvents();s_KeyUp += value;}remove{s_KeyUp -= value;TryUnsubscribeFromGlobalKeyboardEvents();}}///<summary>///Occurs when a key is preseed.///</summary>public static event KeyEventHandler KeyDown{add{EnsureSubscribedToGlobalKeyboardEvents(); s_KeyDown += value;}remove{s_KeyDown -= value;TryUnsubscribeFromGlobalKeyboardEvents(); }}///<summary>///Occurs when a key is pressed.///</summary>///<remarks>///Key events occur in the following order:///<list type="number">///<item>KeyDown</item>///<item>KeyPress</item>///<item>KeyUp</item>///</list>///The KeyPress event is not raised by noncharacter keys; however, the noncharacter keys do raise the KeyDown and KeyUp events.///Use the KeyChar property to sample keystrokes at run time and to consume or modify a subset of common keystrokes.///To handle keyboard events only in your application and not enable other applications to receive keyboard events,///set the KeyPressEventArgs.Handled property in your form's KeyPress event-handling method to <b>true</b>.///</remarks>public static event KeyPressEventHandler KeyPress{add{EnsureSubscribedToGlobalKeyboardEvents();s_KeyPress += value;}remove{s_KeyPress -= value;TryUnsubscribeFromGlobalKeyboardEvents();}}private static event MouseEventHandler s_MouseMove;private static event MouseEventHandler s_MouseClick;private static event MouseEventHandler s_MouseDown;private static event MouseEventHandler s_MouseUp;private static event MouseEventHandler s_MouseWheel;private static event MouseEventHandler s_MouseDoubleClick;private static MouseButtons s_PrevClickedButton;private static Timer s_DoubleClickTimer;private static void DoubleClickTimeElapsed(object sender, EventArgs e) {s_DoubleClickTimer.Enabled = false;s_PrevClickedButton = MouseButtons.None;}private static void OnMouseUp(object sender, MouseEventArgs e){if (e.Clicks < 1){return;}if(e.Button.Equals(s_PrevClickedButton)){if (s_MouseDoubleClick != null){s_MouseDoubleClick.Invoke(null, e);}s_DoubleClickTimer.Enabled = false;s_PrevClickedButton = MouseButtons.None;}else {s_DoubleClickTimer.Enabled = true;s_PrevClickedButton = e.Button;}}private static event KeyPressEventHandler s_KeyPress;private static event KeyEventHandler s_KeyUp;private static event KeyEventHandler s_KeyDown;private const int WH_MOUSE_LL = 14;private const int WH_KEYBOARD_LL = 13;private const int WM_LBUTTONDOWN = 0x201;private const int WM_RBUTTONDOWN = 0x204;private const int WM_LBUTTONUP = 0x202;private const int WM_RBUTTONUP = 0x205;private const int WM_LBUTTONDBLCLK = 0x203;private const int WM_RBUTTONDBLCLK = 0x206;private const int WM_MOUSEWHEEL = 0x020A;private const int WM_KEYDOWN = 0x100;private const int WM_KEYUP = 0x101;private const int WM_SYSKEYDOWN = 0x104;private const int WM_SYSKEYUP = 0x105;private const byte VK_SHIFT = 0x10;private const byte VK_CAPITAL = 0x14;[DllImport("user32.dll", CharSet = CharSet.Auto,CallingConvention = CallingConvention.StdCall)]private static extern int CallNextHookEx(int idHook,int nCode,int wParam,IntPtr lParam);[DllImport("user32.dll", CharSet = CharSet.Auto,CallingConvention = CallingConvention.StdCall, SetLastError = true)] private static extern int SetWindowsHookEx(int idHook,HookProc lpfn,IntPtr hMod,int dwThreadId);[DllImport("user32.dll", CharSet = CharSet.Auto,CallingConvention = CallingConvention.StdCall, SetLastError = true)] private static extern int UnhookWindowsHookEx(int idHook);[DllImport("user32")]private static extern int GetDoubleClickTime();[DllImport("user32")]private static extern int ToAscii(int uVirtKey,int uScanCode,byte[] lpbKeyState,byte[] lpwTransKey,int fuState);[DllImport("user32")]private static extern int GetKeyboardState(byte[] pbKeyState);[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]private static extern short GetKeyState(int vKey);[StructLayout(LayoutKind.Sequential)]private struct Point{internal readonly int X;internal readonly int Y;}[StructLayout(LayoutKind.Sequential)]private struct MouseLLHookStruct{internal Point Point;internal readonly int MouseData;private readonly int Flags;private readonly int Time;private readonly int ExtraInfo;}[StructLayout(LayoutKind.Sequential)]private struct KeyboardHookStruct{internal readonly int VirtualKeyCode;internal readonly int ScanCode;internal readonly int Flags;private readonly int Time;private readonly int ExtraInfo;}private delegate int HookProc(int nCode, int wParam, IntPtr lParam);private static HookProc s_MouseDelegate;private static int s_MouseHookHandle;private static int m_OldX;private static int m_OldY;private static int MouseHookProc(int nCode, int wParam, IntPtr lParam){if (nCode >= 0){var mouseHookStruct = (MouseLLHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseLLHookStruct));var button = MouseButtons.None;short mouseDelta = 0;var clickCount = 0;var mouseDown = false;switch(wParam){case WM_LBUTTONDOWN:mouseDown = true;button = MouseButtons.Left; clickCount = 1;break;case WM_LBUTTONUP:mouseUp = true;button = MouseButtons.Left; clickCount = 1;break;case WM_LBUTTONDBLCLK:button = MouseButtons.Left; clickCount = 2;break;case WM_RBUTTONDOWN:mouseDown = true;button = MouseButtons.Right; clickCount = 1;break;case WM_RBUTTONUP:button = MouseButtons.Right;clickCount = 1;break;case WM_RBUTTONDBLCLK:button = MouseButtons.Right;clickCount = 2;break;case WM_MOUSEWHEEL:mouseDelta = (short)((mouseHookStruct.MouseData >> 16) & 0xffff);break;}var e = new MouseEventExtArgs(button,clickCount,mouseHookStruct.Point.X,mouseHookStruct.Point.Y,mouseDelta);if (s_MouseUp != null && mouseUp){s_MouseUp.Invoke(null, e);if (s_MouseDown != null && mouseDown){s_MouseDown.Invoke(null, e);}if (s_MouseClick != null && clickCount > 0){s_MouseClick.Invoke(null, e);}if (s_MouseDoubleClick != null && clickCount == 2){s_MouseDoubleClick.Invoke(null, e);}if (s_MouseWheel != null && mouseDelta != 0){s_MouseWheel.Invoke(null, e);}if((s_MouseMove != null) && (m_OldX != mouseHookStruct.Point.X || m_OldY != mouseHookStruct.Point.Y))m_OldX = mouseHookStruct.Point.X;m_OldY = mouseHookStruct.Point.Y;if (s_MouseMove != null){s_MouseMove.Invoke(null, e);}}if(e.Handled){return -1;}}return CallNextHookEx(s_MouseHookHandle, nCode, wParam, lParam); }private static void EnsureSubscribedToGlobalMouseEvents(){if (s_MouseHookHandle != 0){return;}s_MouseDelegate = MouseHookProc;s_MouseHookHandle = SetWindowsHookEx(WH_MOUSE_LL,s_MouseDelegate,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);if (s_MouseHookHandle != 0){return;}throw new Win32Exception(Marshal.GetLastWin32Error());}private static void TryUnsubscribeFromGlobalMouseEvents(){if(s_MouseClick == null&& s_MouseDown == null&& s_MouseMove == null&& s_MouseUp == null&& s_MouseWheel == null){ForceUnsunscribeFromGlobalMouseEvents();}}private static void ForceUnsunscribeFromGlobalMouseEvents(){if (s_MouseHookHandle == 0){return;}var result = UnhookWindowsHookEx(s_MouseHookHandle);s_MouseHookHandle = 0;s_MouseDelegate = null;if (result != 0){return;}throw new Win32Exception(Marshal.GetLastWin32Error());}private static HookProc s_KeyboardDelegate;private static int s_KeyboardHookHandle;private static int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam){var handled = false;if (nCode >= 0){var MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam,typeof(KeyboardHookStruct));if(s_KeyDown != null&& (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN)){var keyData = (Keys)MyKeyboardHookStruct.VirtualKeyCode;var e = new KeyEventArgs(keyData);s_KeyDown.Invoke(null, e);handled = e.Handled;}if (s_KeyPress != null && wParam == WM_KEYDOWN){var isDownShift = ((GetKeyState(VK_SHIFT) & 0x80) == 0x80);var isDownCapslock = (GetKeyState(VK_CAPITAL) != 0);var keyState = new byte[256];GetKeyboardState(keyState);var inBuffer = new byte[2];if(ToAscii(MyKeyboardHookStruct.VirtualKeyCode,MyKeyboardHookStruct.ScanCode,keyState,inBuffer,MyKeyboardHookStruct.Flags) == 1){var key = (char)inBuffer[0];if ((isDownCapslock ^ isDownShift) && Char.IsLetter(key)) key = Char.ToUpper(key);var e = new KeyPressEventArgs(key);s_KeyPress.Invoke(null, e);handled = handled || e.Handled;}}if(s_KeyUp != null&& (wParam == WM_KEYUP || wParam == WM_SYSKEYUP)) {var keyData = (Keys)MyKeyboardHookStruct.VirtualKeyCode;var e = new KeyEventArgs(keyData);s_KeyUp.Invoke(null, e);handled = handled || e.Handled;}}if(handled){return -1;}return CallNextHookEx(s_KeyboardHookHandle, nCode, wParam, lParam); }private static void EnsureSubscribedToGlobalKeyboardEvents(){if (s_KeyboardHookHandle != 0){return;}s_KeyboardDelegate = KeyboardHookProc;s_KeyboardHookHandle = SetWindowsHookEx(WH_KEYBOARD_LL,s_KeyboardDelegate,Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),0);if (s_KeyboardHookHandle != 0){return;}throw new Win32Exception(Marshal.GetLastWin32Error());}private static void TryUnsubscribeFromGlobalKeyboardEvents(){if (s_KeyDown != null || s_KeyUp != null || s_KeyPress != null) {return;}if (s_KeyboardHookHandle == 0){return;}var result = UnhookWindowsHookEx(s_KeyboardHookHandle);s_KeyboardHookHandle = 0;s_KeyboardDelegate = null;if (result != 0){return;}throw new Win32Exception(Marshal.GetLastWin32Error());}}internal class MouseEventExtArgs : MouseEventArgs{internal MouseEventExtArgs(MouseButtons buttons, int clicks, int x, int y, int delta): base(buttons, clicks, x, y, delta){ }internal bool Handled { get; set; }}}。
