线程间操作无效: 从不是创建控件“pbarc”的线程访问它 解决方法

 public partial class Form5 : Form
    {

        public Thread PBarThread;
        private delegate void MyTestDelegate(object obj);
        private MyTestDelegate myTest;
        /// <summary>
        /// dev进度条
        /// </summary>
        private DevExpress.XtraEditors.ProgressBarControl pBarc;
        public Form5()
        {
            InitializeComponent();
        }
        private void Form5_Load(object sender, EventArgs e)
        {
            pBarc.Properties.Minimum = 0;//设置进度条最小值
            pBarc.Properties.Maximum = 10;//设置进度条最大值
            pBarc.Properties.Step = 1;//设置进度条步长
            pBarc.Properties.ProgressViewStyle = DevExpress.XtraEditors.Controls.ProgressViewStyle.Broken;//设置进度条样式
            pBarc.Position = 0;//设置进度条开始位置
        }
        private void button1_Click(object sender, EventArgs e)
        {
            PBarThread = new Thread(new ParameterizedThreadStart(fun));
            PBarThread.Start();
        }
        /// <summary>
        /// 线程执行的事件 在子线程中为代理赋值，并执行代理 防止线程跨界访问错误
        /// </summary>
        /// <param name="obj"></param>
        private void fun(object obj)
        {
            if (this.InvokeRequired)
            {
                myTest += fun;
                this.BeginInvoke(myTest, new object[] { obj });
            }
            else
            {
                pBarc.PerformStep();//走进度条
            }
        }
    }