namespace PBarAndProc
{
    public partial class Form1 : Form
    {
        delegate void Copy();
        delegate void ToBrogressBar(string s1, string s2);
        ToBrogressBar ToBarFunc;

        public Form1()
        {
            InitializeComponent();
            ToBarFunc = new ToBrogressBar(ToPBar);
        }

        protected override void OnLoad(EventArgs e)
        {
            base.OnLoad(e);

            Copy cpy = new Copy(CopyMy);
            IAsyncResult res = cpy.BeginInvoke(new AsyncCallback(CallBack), null);
        }

        void CallBack(IAsyncResult r)
        {
            label1.Text = "Готово!";
            this.BackColor = Color.Red;
            //this.Close();
        }

        void ToPBar(string s1, string s2)
        {
            progressBar1.Value++;
            label1.Text = s1 + " -> " + s2;
        }

        void CopyMy()
        {            
            int n = 100;
            for (int i = 0; i < n; i++)
            {                
                Thread.Sleep(5);    // Copy...
                progressBar1.Invoke(ToBarFunc, new object[] { (i + 1).ToString(), (n).ToString() });
            }
        }
    }
}