Form1.cs

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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 System.Collections;

namespace handwriting
{
    public partial class Form1 : Form
    {
        bool hw;
        Graphics g;
        Pen p = new Pen(Color.Black);
        int x1, y1, x2, y2;
        List<string> htPoint;
        int points = 0;
        public Form1()
        {
            InitializeComponent();
        }
        //下载于www.51aspx.com
        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            switch (comboBox1.SelectedIndex)
            {
                case 0:
                   p.Width = 1;
                    break;
                case 1:
                    p.Width = 2;
                    break;
                case 2:
                    p.Width = 3;
                    break;
                case 3:
                    p.Width = 5;
                    break;
                case 4:
                    p.Width = 15;
                    break;


            }
        }


        private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
        {
            hw = false;
        }

        private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
        {
           
            g = pictureBox1.CreateGraphics();