using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Diagnostics;using System.Windows.Forms;namespace WindowsFormsApplication3{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)        {         //   this.Visible = false;                         //隐藏              this.WindowState = FormWindowState.Minimized;   //最小化      //      this.WindowState = FormWindowState.Maximized;   //最大化      //      this.WindowState = FormWindowState.Normal;      //正常        }    }}