private void button4_Click(object sender, EventArgs e)
        {
            ConnectBL conBL = new ConnectBL();
            ConnectBO conBO = new ConnectBO();

            try
            {
                conBO.db = textBox3.Text;
                conBL.CreateDb(conBO);
            }
            catch (OdbcException ex)
            {
                MessageBox.Show(ex.Errors[0].ToString());
            }
        }