[转]winform实现的仿Msn移动提示信息窗口

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

namespace WindowsApplication1
{
    public partial class Form2 : Form
    {
        private int screenWidth;//屏幕宽度    
        private int screenHeight;//屏幕高度  
        private bool finished = false;//是否完全显示提示窗口
        public Form2()
        {
            InitializeComponent();
            screenHeight = Screen.PrimaryScreen.Bounds.Height;
            screenWidth = Screen.PrimaryScreen.Bounds.Width;
            //设置提示窗口坐标在屏幕可显示区域之外    
            Location = new Point(screenWidth - Width, screenHeight);   
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (!finished)//如果提示窗口没有完全显示   
            {
                //如果提示窗口的纵坐标与提示窗口的高度之和大于屏幕高度    
                if (Location.Y + Height >= screenHeight)
                {
                    Location = new Point(Location.X, Location.Y - 5);
                }
               
            }
            else//如果提示窗口已经完成了显示，并且点击了确定按钮    
            {
                //如果提示窗口没有完全从屏幕上消失    
                if (Location.Y < screenHeight)
                {
                    Location = new Point(Location.X, Location.Y + 5);
                }
                else
                {
                    this.Close();
                }
            }
        }
        private void btnOK_Click(object sender, EventArgs e)
        {
            //设置完成了显示，以便让提示控件移出屏幕可显示区域    
            finished = true;
        }

        private void Form2_Load(object sender, EventArgs e)
        {
            screenHeight = Screen.PrimaryScreen.Bounds.Height;
            screenWidth = Screen.PrimaryScreen.Bounds.Width;
            //设置提示窗口坐标在屏幕可显示区域之外    
            Location = new Point(screenWidth - Width, screenHeight);            
        }  

    }
}