//Focus pe label1
 private void Login_Shown(object sender, EventArgs e)
 {
     label1.Focus();
     if (checkBox1.Checked == true)
     {
         this.Hide();
         Librarie f = new Librarie();
         f.Closed += (s, args) => this.Close();
         f.Show();
     }
 }
        //Logare
        private void btnLogare_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == "" || textBox2.Text == "")
            {
                MessageBox.Show("Completati ambele campuri.");
            }
            else
            {
                OleDbConnection  con  = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=Users.accdb");
                OleDbDataAdapter odda = new OleDbDataAdapter("Select * from Client where User='******' and Parola='" + textBox2.Text + "'", con);
                DataTable        dt   = new DataTable();
                odda.Fill(dt);
                try
                {
                    if (dt.Rows[0][0].ToString() != "0")
                    {
                        if (checkBox2.Checked == true)
                        {
                            Properties.Settings.Default.UserName = textBox1.Text;
                            Properties.Settings.Default.Parola   = textBox2.Text;
                            Properties.Settings.Default.Save();
                        }
                        else
                        {
                            Properties.Settings.Default.UserName = "";
                            Properties.Settings.Default.Parola   = "";
                            Properties.Settings.Default.Save();
                        }

                        System.IO.File.WriteAllText(@"textbox1.txt", textBox1.Text.ToString());
                        this.Hide();
                        Librarie f = new Librarie();
                        f.Closed += (s, args) => this.Close();
                        f.Show();
                    }
                }
                catch
                {
                    label2.Visible = true;
                    label2.Text    = "Eroare la autentificare.\nNume de utilizator sau parolă greșită.";
                }
            }
        }