private void Button1_Click(object sender, EventArgs e)
        {
            eLearning_start f = new eLearning_start(this);

            f.Show();
            this.Hide();
        }
 public eLearning_Elev(eLearning_start f)
 {
     InitializeComponent();
     parent  = f;
     con     = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename='" + parent.caleMDF + "';Integrated Security=True");
     check   = new CheckBox[] { null, checkBox1, checkBox2, checkBox3, checkBox4 };
     adev[0] = adev[1] = adev[2] = adev[3] = adev[4] = 0;
     for (int i = 0; i <= 9; i++)
     {
         itemiA[i] = 0;
     }
     label2.Visible = label5.Visible = false;
 }