1 public void loadRegister()
2         {
3             lbelPaswrd.Text = "长度不得低于6位";
4             lbelPaswrd.ForeColor = Color.Gray;
5             Font MyFont = new Font("宋体", 9, FontStyle.Italic);
6             lbelPaswrd.Font = MyFont;
7         }

1 private void lbelPaswrd_MouseDown(object sender, MouseEventArgs e)
2         {
3             lbelPaswrd.Visible = false;
4             tBoxRPasWd.Focus();
5         }

1  private void tBoxRPasWd_Leave(object sender, EventArgs e)
2         {
3             if (tBoxRPasWd.Text == string.Empty)
4                 lbelPaswrd.Visible = true;
5         }