c# 窗体自动隐藏

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

namespace WindowsApplication8
{
    public partial class Form1 : Form
    {
        internal AnchorStyles StopDock = AnchorStyles.None;   
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.TopMost = true;
            Timer checkDockTimer = new Timer();
            checkDockTimer.Tick += new EventHandler(StopRectTimer_Tick);
            checkDockTimer.Interval = 100;
            checkDockTimer.Enabled = true;

        }
        private void StopRectTimer_Tick(object sender, EventArgs e)
        {
            //如果鼠标在窗体上，则根据停靠位置显示整个窗体
            if (this.Bounds.Contains(Cursor.Position))
            {
                switch (this.StopDock)
                {
                    case AnchorStyles.Top:
                        this.Location = new Point(this.Location.X, 0);
                        break;
                    case AnchorStyles.Bottom:
                        this.Location = new Point(this.Location.X, Screen.PrimaryScreen.Bounds.Height - this.Height);
                        break;
                    case AnchorStyles.Left:
                        this.Location = new Point(0, this.Location.Y);
                        break;
                    case AnchorStyles.Right:
                        this.Location = new Point(Screen.PrimaryScreen.Bounds.Width - this.Width, this.Location.Y);
                        break;
                }
            }
            else  //如果鼠标离开窗体，则根据停靠位置隐藏窗体，但须留出部分窗体边缘以便鼠标选中窗体
            {
                switch (this.StopDock)
                {
                    case AnchorStyles.Top:
                        this.Location = new Point(this.Location.X, (this.Height - 3) * (-1));
                        break;
                    case AnchorStyles.Bottom:
                        this.Location = new Point(this.Location.X, Screen.PrimaryScreen.Bounds.Height - 5);
                        break;
                    case AnchorStyles.Left:
                        this.Location = new Point((-1) * (this.Width - 3), this.Location.Y);
                        break;
                    case AnchorStyles.Right:
                        this.Location = new Point(Screen.PrimaryScreen.Bounds.Width - 2, this.Location.Y);
                        break;
                }
            }
        }

        private void Form1_LocationChanged(object sender, EventArgs e)
        {
            if (this.Top <= 0)
            {
                this.StopDock = AnchorStyles.Top;
            }
            else if (this.Bottom >= Screen.PrimaryScreen.Bounds.Height)
            {
                this.StopDock = AnchorStyles.Bottom;
            }
            else if (this.Left <= 0)
            {
                this.StopDock = AnchorStyles.Left;
            }
            else if (this.Left >= Screen.PrimaryScreen.Bounds.Width - this.Width)
            {
                this.StopDock = AnchorStyles.Right;
            }
            else
            {
                this.StopDock = AnchorStyles.None;
            }

        }

    }
}