private void Form1_KeyDown(object sender, KeyEventArgs e)

        {

            if (e.KeyCode == Keys.Z)

            {

                jiang = "一等奖";

            }

            if (e.KeyCode == Keys.X)

            {

                jiang = "二等奖";

            }

            if (e.KeyCode == Keys.C)

            {

                jiang = "三等奖";

            }

        }