Как реализовать глобальный хук для мыши

        /// <summary>
        /// Windows NT/2000/XP: Installs a hook procedure that monitors low-level mouse input events.
        /// </summary>
        private const int WH_MOUSE_LL       = 14;
 
        /// <summary>
        /// Installs a hook procedure that monitors mouse messages. For more information, see the MouseProc hook procedure. 
        /// </summary>
        private const int WH_MOUSE          = 7;
 
        /// <summary>
        /// The WM_MOUSEMOVE message is posted to a window when the cursor moves. 
        /// </summary>
        private const int WM_MOUSEMOVE      = 0x200;
        /// <summary>
        /// The WM_LBUTTONDOWN message is posted when the user presses the left mouse button 
        /// </summary>
        private const int WM_LBUTTONDOWN    = 0x201;
        /// <summary>
        /// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button
        /// </summary>
        private const int WM_RBUTTONDOWN    = 0x204;
        /// <summary>
        /// The WM_MBUTTONDOWN message is posted when the user presses the middle mouse button 
        /// </summary>
        private const int WM_MBUTTONDOWN    = 0x207;
        /// <summary>
        /// The WM_LBUTTONUP message is posted when the user releases the left mouse button 
        /// </summary>
        private const int WM_LBUTTONUP      = 0x202;
        /// <summary>
        /// The WM_RBUTTONUP message is posted when the user releases the right mouse button 
        /// </summary>
        private const int WM_RBUTTONUP      = 0x205;
        /// <summary>
        /// The WM_MBUTTONUP message is posted when the user releases the middle mouse button 
        /// </summary>
        private const int WM_MBUTTONUP      = 0x208;
        /// <summary>
        /// The WM_LBUTTONDBLCLK message is posted when the user double-clicks the left mouse button 
        /// </summary>
        private const int WM_LBUTTONDBLCLK  = 0x203;
        /// <summary>
        /// The WM_RBUTTONDBLCLK message is posted when the user double-clicks the right mouse button 
        /// </summary>
        private const int WM_RBUTTONDBLCLK  = 0x206;
        /// <summary>
        /// The WM_RBUTTONDOWN message is posted when the user presses the right mouse button 
        /// </summary>
        private const int WM_MBUTTONDBLCLK  = 0x209;
        /// <summary>
        /// The WM_MOUSEWHEEL message is posted when the user presses the mouse wheel. 
        /// </summary>
        private const int WM_MOUSEWHEEL     = 0x020A;

if (e.Keys == Keys.E) // Флажок
                {
                    
                    
                       MessageBox.Show("ыы");
                    }
                    else
                    {
 
                        MessageBox.Show("ыы");
                           
                       
 
                    }

public enum HookType : int
        {
            WH_JOURNALRECORD = 0,
            WH_JOURNALPLAYBACK = 1,
            WH_KEYBOARD = 2,
            WH_GETMESSAGE = 3,
            WH_CALLWNDPROC = 4,
            WH_CBT = 5,
            WH_SYSMSGFILTER = 6,
            WH_MOUSE = 7,
            WH_HARDWARE = 8,
            WH_DEBUG = 9,
            WH_SHELL = 10,
            WH_FOREGROUNDIDLE = 11,
            WH_CALLWNDPROCRET = 12,
            WH_KEYBOARD_LL = 13,
            WH_MOUSE_LL = 14,
            WM_LBUTTONUP = 0x202,//разницы ведь нет он сам переведёт в 10чную
 
        }

  if (e.Keys == Keys.LButton) // Флажок
                {
 
                    MessageBox.Show("ы");
                    }
                    else
                    {
 
                        MessageBox.Show("ыы");
 
                    }