LoginFormButtonClickEvent

// Login Form
public void btnLoginLogin_Click(object sender, EventArgs e)
        {
            string connStr = @"Data Source=HRISI-PC;Initial Catalog=CourseWorkVP;Integrated Security=True";
            SqlConnection sqlConn = new SqlConnection(connStr);

            string userName = txtBoxUsernameLogin.Text;
            string password = txtBoxPassLogin.Text;

            sqlConn.Open();

            using (SqlCommand strQuery = new SqlCommand("SELECT * FROM Clients WHERE Name=@un AND Password=@pw", sqlConn))
            {
                strQuery.Parameters.AddWithValue("@un", userName);
                strQuery.Parameters.AddWithValue("@pw", password);
                SqlDataReader sqldr = strQuery.ExecuteReader();
                if (sqldr.HasRows)
                {
                    MessageBox.Show("Login Successful!");
                    this.Close();
                }
                else
                {
                    MessageBox.Show("Invalid Username / Password!");
                    // lost password form?
                }
            }
        }