水平滚动条问题

Question

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;namespace WindowsApplication2
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private void hScrollBar1_Scroll(object sender, ScrollEventArgs e)
        {
                int mysize;
                hScrollBar1.Minimum = 5;
                hScrollBar1.Maximum = 55;
                hScrollBar1.SmallChange = 1;
                hScrollBar1.LargeChange = 5;
                mysize = hScrollBar1.Value;
                textBox1.Font = new System.Drawing.Font("宋体", mysize);
           
        }      
    }
}就出现异常 
为什么我直接在属性中将Minimum = 5 Maximum = 55 
                      SmallChange = 1   LargeChange = 5
就能够运行呢？

Answer 1

hScrollBar1.Minimum = 5;
                hScrollBar1.Maximum = 55;
                hScrollBar1.SmallChange = 1;
                hScrollBar1.LargeChange = 5;
放到Load事件中