using System;
using System.Collections.Generic;
using
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace yundng
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }


        private void button1_Click(object sender, EventArgs e)
        {
            double myWidth = this.ClientSize.Width;
            double myHeight = this.ClientSize.Height;
            int j = 0;
            int k = 0;
            while (j<myWidth)
            {
                label1.Location = new Point(label1.Location.X + 1, label1.Location.Y);
                j++;
            }
            while (k<myHeight)
            {
                label1.Location = new Point(label1.Location.X, label1.Location.Y +1);
                k++;
            }
            while (j>0)
            {
                label1.Location = new Point(label1.Location.X - 1, label1.Location.Y);
                j--;
            }
            while (k > 0)
            {
                label1.Location = new Point(label1.Location.X, label1.Location.Y - 1);
                k--;
            }
        }

  }
    这样写的话，代码错在哪？