public void setPbPrecess(int value)
 {
     if (pb.InvokeRequired)//其它线程调用
     {
         delPbProcess d = new delPbProcess(setPbPrecess);
         pb.Invoke(d, new object[] { value });
     }
     else//本线程调用
     {
         pb.Value = value;
         pb.Text  = value + "%";
         pb.Refresh();
     }
 }