Клик мышкой при кручении колёсика

using System;
using System.Diagnostics;
using System.Runtime.InteropServices;
using System.Windows.Forms;
 
namespace Clicker
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll", SetLastError = true)]
        public static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint dwData, int dwExtraInfo);
        int i;
        public Form1()
        {
            InitializeComponent();
            MouseHook.Start();
            MouseHook.MouseAction += new EventHandler(Event);
        }
 
        [Flags]
        public enum MouseEventFlags
        {
            LEFTDOWN = 0x00000002,
            LEFTUP = 0x00000004,
        }
 
        private void Event(object sender, EventArgs e)
        {
            mouse_event((uint)MouseEventFlags.LEFTDOWN, 0, 0, 0, 0);
            mouse_event((uint)MouseEventFlags.LEFTUP, 0, 0, 0, 0);
            i++; 
            label1.Text = i.ToString(); }
        }
 
        public static class MouseHook
    {
        public static event EventHandler MouseAction = delegate { };
 
        public static void Start()
        {
            _hookID = SetHook(_proc);
        }
        public static void stop()
        {
            UnhookWindowsHookEx(_hookID);
        }
 
        private static LowLevelMouseProc _proc = HookCallback;
        private static IntPtr _hookID = IntPtr.Zero;
 
        private static IntPtr SetHook(LowLevelMouseProc proc)
        {
            using (Process curProcess = Process.GetCurrentProcess())
            using (ProcessModule curModule = curProcess.MainModule)
            {
                return SetWindowsHookEx(WH_MOUSE_LL, proc,
                  GetModuleHandle(curModule.ModuleName), 0);
            }
        }
 
        private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);
 
        private static IntPtr HookCallback(
          int nCode, IntPtr wParam, IntPtr lParam)
        {
            if (nCode >= 0 && MouseMessages.WM_MOUSEWHEEL == (MouseMessages)wParam)
            {
                MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
                MouseAction(null, new EventArgs());
            }
            return CallNextHookEx(_hookID, nCode, wParam, lParam);
        }
 
        private const int WH_MOUSE_LL = 14;
 
        private enum MouseMessages
        {
            WM_LBUTTONDOWN = 0x0201,
            WM_LBUTTONUP = 0x0202,
            WM_MOUSEMOVE = 0x0200,
            WM_MOUSEWHEEL = 0x020A,
            WM_RBUTTONDOWN = 0x0204,
            WM_RBUTTONUP = 0x0205
        }
 
        [StructLayout(LayoutKind.Sequential)]
        private struct POINT
        {
            public int x;
            public int y;
        }
 
        [StructLayout(LayoutKind.Sequential)]
        private struct MSLLHOOKSTRUCT
        {
            public POINT pt;
            public uint mouseData;
            public uint flags;
            public uint time;
            public IntPtr dwExtraInfo;
        }
 
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SetWindowsHookEx(int idHook,
          LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);
 
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool UnhookWindowsHookEx(IntPtr hhk);
 
        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode,
          IntPtr wParam, IntPtr lParam);
 
        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string lpModuleName);
    }
}