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

namespace pop3
{
/// <summary>
/// Summary description for WinForm1.
/// </summary>
public class WinForm1 : System.Windows.Forms.Form
{
/// <summary>
/// Required designer variable.
/// </summary>
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.LinkLabel linkLabel1;
public string str_num;

public WinForm1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();

//
// TODO: Add any constructor code after InitializeComponent call
//
}

/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose (bool disposing)
{
if (disposing)
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose(disposing);
}

#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
System.Resources.ResourceManager resources = new System.Resources.ResourceManager(typeof(WinForm1));
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.linkLabel1 = new System.Windows.Forms.LinkLabel();
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);
//
// linkLabel1
//
this.linkLabel1.AutoSize = true;
this.linkLabel1.BackColor = System.Drawing.Color.WhiteSmoke;
this.linkLabel1.Location = new System.Drawing.Point(56, 56);
this.linkLabel1.Name = "linkLabel1";
this.linkLabel1.Size = new System.Drawing.Size(79, 17);
this.linkLabel1.TabIndex = 0;
this.linkLabel1.TabStop = true;
this.linkLabel1.Text = "您有新邮件！";
//
// WinForm1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.BackColor = System.Drawing.SystemColors.Info;
this.BackgroundImage = ((System.Drawing.Image)(resources.GetObject("$this.BackgroundImage")));
this.ClientSize = new System.Drawing.Size(194, 122);
this.Controls.Add(this.linkLabel1);
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
this.Name = "WinForm1";
this.ShowInTaskbar = false;
this.Text = "信息提示";
this.TopMost = true;
this.Load += new System.EventHandler(this.WinForm1_Load);
this.Activated += new System.EventHandler(this.WinForm1_Activated);
this.ResumeLayout(false);
}
#endregion

private void WinForm1_Load(object sender, System.EventArgs e)
{
Screen[] screens = Screen.AllScreens;
Screen screen = screens[0];
this.Location = new Point(screen.WorkingArea.Width - 200, screen.WorkingArea.Height - 30);
this.timer2.Interval = 5000;
}

private void ScrollUp()
{
if(Height < 122)
{
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(Height > 3)
{
this.Height -= 3;
this.Location = new Point(this.Location.X, this.Location.Y + 3);
}
else
{
this.timer3.Enabled = false;
this.Close();
}
}

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();
}

　　3.获取邮件数量的实现，代码见下

　　程序与邮件服务器建立一个TCP连接，然后发送POP3的一些命令，取到服务器传回的信息，得到邮件的数量。

　　STAT命令的回应中有两个数字，分别表示邮件的数量和邮件的大小。一般格式是这样的“+OK 数量 大小”，所以只要根据服务器返回的信息，提取+OK，然后再按空格分隔得到数量。代码见上。
　4.注册表的读写：

　　我们知道，要实现程序在开机后自己运行，可以通过写注册表HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run实现。

　　另外，为了方便用户，我们把邮件服务器，用户,密码等信息存入注册表，不用每次都再输一次。

　　保存信息代码如下：

　　启动程序时读入信息：

　　按F9编译程序并运行。如图：

　　[ 相关贴图 ]


　　[ 相关贴图 ]


　　[ 相关贴图 ]


　　四．小结：

　　本文向读者介绍了如何运用Borland C# Builder实现POP3信箱的监视，其中大量运用了Windows Forms编程和.Net框架下的网络编程的原理。通过本文，希望能使读者对.Net中的Borland C# builder有一个感性的认识，同时对Windows Forms编程和其中的网络编程也有个大致的了解。如果有兴趣，可以到悠游在线(网址：http://yousoft.hi.com.cn)下载全部的源代码或与本人交流。


public void ScrollShow()
{
this.Width = 194;
this.Height = 0;
this.Show();
this.timer1.Enabled = true;
}

private void WinForm1_Activated(object sender, System.EventArgs e)
{
linkLabel1.Text="您有"+str_num+"封新邮件！";
}

}
}