日前，在C#教程上看到一段代码，编译调试后，结果不对。还请各位高手答疑解惑，不胜感激！！
代码功能：
设置两个button：button1,button2，显示和隐藏窗体，但是运行后，两个控件不起作用。
代码如下：
public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

        }
        static int x = 200;
        static int y = 200;
        static int count = 0;
        private void button1_Click(Object sender, EventArgs e)
        {
           
            Form1 form2 = new Form1();
            form2.FormBorderStyle = FormBorderStyle.Fixed3D;
            form2.Cursor = Cursors.Hand;
            form2.SetDesktopLocation(x, y);
            form2.Visible = true;
            x += 30;
            y += 30;
            
            this.Activate();
            this.button1.Enabled = true;

            
            label1.Text="新窗体的坐标（"+x+","+y+"）";
            label2.Text="这是第"+count+"个窗体";
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            count += 1;
        }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            MessageBox.Show("Wrong");
            this.Hide();

        }
        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            count -= 1;
            
        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Hide();
        }

在button1_Click里，调用form2.Show()或者form2.ShowDialog()

可是，已经有form2.Visible = true;了
我试了，还是不出结果啊，救命啊，

重新尝试一下。呵呵，可能是你的控件的事件没有注册到。

 public Form1()
        {
            InitializeComponent();

            this.button1.Click +=new EventHandler(button1_Click);
            this.button2.Click +=new EventHandler(button2_Click);
            this.FormClosed += new FormClosedEventHandler(Form1_FormClosed);

            this.Load +=new EventHandler(Form1_Load);
            this.FormClosing +=new FormClosingEventHandler(Form1_FormClosing);
        }
        static int x = 200;
        static int y = 200;
        static int count = 0;
        private void button1_Click(Object sender, EventArgs e)
        {

            Form1 form2 = new Form1();
            form2.FormBorderStyle = FormBorderStyle.Fixed3D;
            form2.Cursor = Cursors.Hand;
            form2.SetDesktopLocation(x, y);
            form2.Visible = true;
            x += 30;
            y += 30;

            this.Activate();
            this.button1.Enabled = true;
            label1.Text = "新窗体的坐标（" + x + "," + y + "）";
            label2.Text = "这是第" + count + "个窗体";
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            count += 1;
        }
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            MessageBox.Show("Wrong");
            this.Hide();

        }
        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            count -= 1;

        }

        private void button2_Click(object sender, EventArgs e)
        {
            this.Hide();
        }
    }

哦，这次成功了，为什么还要用代码注册，我看其他程序也没这个呀？

其他程序有，只是你双击控件的时候，把注册事件生成在 FormXXX.Design.cs里面了。你可以看一下。

看来是没有把 按钮 和 代码连接到一起, 点击按钮, 在事件属性的 Click 中下拉, 选择对应的函数名即可, 直接双击会生成新的函数.

用 C# 设计窗体的时候, 注意看 class 前面有一个 partial , 表示类的代码是拆成几部分的,
控件的大小, 位置, 事件连接等信息是放进 InitializeComponent() 的, 在 xxx.Desinger.cs 文件中.

哦，知道了，受教，呵呵。