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   源码介绍

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Microsoft.Win32;
using System.Runtime.InteropServices;

namespace 周大生专用
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        public Form3 frm3;
        public Form2 frm2;

        private void timer1_Tick(object sender, EventArgs e)
        {

            toolStripStatusLabel3.Text = DateTime.Now.ToLongTimeString();
        }

        private void Form1_Load_1(object sender, EventArgs e)
        {
            timer1.Start();
            textBox1.Hide();
             try                                       //可能有异常，放在try块中
              {
                   RegistryKey rsg = null;               //声明变量
                 rsg = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Microsoft", true); //true表可修改
                   if (rsg.GetValue("HoanReg") != null)    //如果值不为空
                 {
                       this.textBox1.Text = rsg.GetValue("HoanReg").ToString();                                                           //读取值
                  }
                  else
                        this.textBox1.Text = "user";
                   rsg.Close();                           //关闭
                }
               catch (Exception ex)                       //捕获异常
               {
                    this.textBox1.Text = ex.Message;           //显示异常信息
               }


        }

        private void button1_Click(object sender, EventArgs e)
        {
            this.Hide();
            if(frm2==null)
             frm2 = new Form2();
            frm2.f1 = this;
            frm2.Show();
        }

        private void toolStripButton1_Click(object sender, EventArgs e)
        {
            if(frm3==null)
            frm3 = new Form3();
            frm3.f1 = this;
            frm3.Show();
        }

        private void toolStripButton2_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void 退出FToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Close();
        }

        private void 注销AToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.Hide();
            if (frm2 == null)
                frm2 = new Form2();
            frm2.f1 = this;
            frm2.Show();
        }

        private void toolStripButton6_Click(object sender, EventArgs e)
        {
            this.Hide();
            if (frm2 == null)
                frm2 = new Form2();
            frm2.f1 = this;
            frm2.Show();
        }

        private void 修改密码XToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (frm3 == null)
                frm3 = new Form3();
            frm3.f1 = this;
            frm3.Show();
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }
    }
}