C#写的一个msn的消息提示类

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
namespace WindowsApplication1
{
/// <summary>
/// 使用方法： 1)修改namespace适合您的工程
/// 2)MsnAlert alert = new MsnAlert("我要显示的消息");
/// 或MsnAlert alert = new MsnAlert("我要显示的消息",System.Drawing.ContentAlignment.MiddleCenter);
/// </summary>
public class MsnAlert : System.Windows.Forms.Form
{
private int heightMax, widthMax;
public int StayTime = 1000;
private System.ComponentModel.IContainer components;
private System.Windows.Forms.Timer timer1;
private System.Windows.Forms.Timer timer2;
private System.Windows.Forms.Timer timer3;
private System.Windows.Forms.Label label1;
public MsnAlert(string msg)
{
InitializeComponent();

this.heightMax = 120;//窗体滚动的高度
this.widthMax = 148;//窗体滚动的宽度
this.label1.Text = msg;
this.ScrollShow();
}
public MsnAlert(string msg, System.Drawing.ContentAlignment textAlign)
{
InitializeComponent();

this.label1.TextAlign = textAlign;
this.heightMax = 120;//窗体滚动的高度
this.widthMax = 148;//窗体滚动的宽度
this.label1.Text = msg;
this.ScrollShow();
}
/// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if(components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows 窗体设计器生成的代码
/// <summary>
/// 设计器支持所需的方法 - 不要使用代码编辑器修改
/// 此方法的内容。
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.timer1 = new System.Windows.Forms.Timer(this.components);
this.timer2 = new System.Windows.Forms.Timer(this.components);
this.timer3 = new System.Windows.Forms.Timer(this.components);
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// timer1
//
this.timer1.Interval = 10;
this.timer1.Tick += new System.EventHandler(this.timer1_Tick);
//
// timer2
//
this.timer2.Interval = 10;
this.timer2.Tick += new System.EventHandler(this.timer2_Tick);
//
// timer3
//
this.timer3.Interval = 10;
this.timer3.Tick += new System.EventHandler(this.timer3_Tick);
//
// label1
//
this.label1.Location = new System.Drawing.Point(8, 8);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(144, 128);
this.label1.TabIndex = 0;
this.label1.Text = "您有新的消息";
this.label1.TextAlign = System.Drawing.ContentAlignment.MiddleCenter;
//
// MsnAlert
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackColor = System.Drawing.SystemColors.Desktop;
this.ClientSize = new System.Drawing.Size(160, 144);
this.Controls.Add(this.label1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.Name = "MsnAlert";
this.ShowInTaskbar = false;
this.Text = "Form2";
this.TopMost = true;
this.Load += new System.EventHandler(this.Form_Load);
this.ResumeLayout(false);
}
#endregion
public int HeightMax
{
set
{
heightMax = value;
}
get
{
return heightMax;
}
}
public int WidthMax
{
set
{
widthMax = value;
}
get
{
return widthMax;
}
}

private void ScrollShow()
{
this.Width = widthMax;
this.Height = 0;
this.Show();
this.timer1.Enabled = true;
}
private void ScrollUp()
{
if(this.Height < heightMax)
{
this.Height += 3;
this.Location = new Point(this.Location.X, this.Location.Y - 3);
}
else
{
this.timer1.Enabled = false;
this.timer2.Enabled = true;
}
}
private void ScrollDown()
{
if(this.Height > 3)
{
this.Height -= 3;
this.Location = new Point(this.Location.X, this.Location.Y + 3);
}
else
{
this.timer3.Enabled = false;
this.Close();
this.Dispose(true);
}
}
private void Form_Load(object sender, System.EventArgs e)
{
Screen[] screens = Screen.AllScreens;
Screen screen = screens[0];
this.Location = new Point(screen.WorkingArea.Width - widthMax - 20, screen.WorkingArea.Height - 34);
this.timer2.Interval = StayTime;
}
private void timer1_Tick(object sender, System.EventArgs e)
{
ScrollUp();
}
private void timer2_Tick(object sender, System.EventArgs e)
{
timer2.Enabled = false;
timer3.Enabled = true;
}
private void timer3_Tick(object sender, System.EventArgs e)
{
ScrollDown();
}
}
}