C#模擬鼠標

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll")]
        static extern bool SetCursorPos(int X, int Y);

        [DllImport("user32.dll")]
        static extern void mouse_event(MouseEventFlag flags, int dx, int dy, uint data, UIntPtr extraInfo);

        [Flags]
        enum MouseEventFlag : uint
        {
            Move = 0x0001,
            LeftDown = 0x0002,
            LeftUp = 0x0004,
            RightDown = 0x0008,
            RightUp = 0x0010,
            MiddleDown = 0x0020,
            MiddleUp = 0x0040,
            XDown = 0x0080,
            XUp = 0x0100,
            Wheel = 0x0800,
            VirtualDesk = 0x4000,
            Absolute = 0x8000
        }

        System.Timers.Timer tm = new System.Timers.Timer(1000);
        public Form1()
        {
            InitializeComponent();

            tm.Elapsed += new System.Timers.ElapsedEventHandler(tm_Elapsed);
            tm.Enabled = true;
        }

        void tm_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            Random rdm = new Random();
            int x=rdm.Next(20, 300);
            int y = rdm.Next(20, 300);
            SetCursorPos(x,y);
            mouse_event(MouseEventFlag.LeftDown, 0, 0, 0, UIntPtr.Zero);
            mouse_event(MouseEventFlag.LeftUp, 0, 0, 0, UIntPtr.Zero);

        }
    }
}