C#

public partial class logon : Form
{
    OleDbConnection conn = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\database.mdb");
    OleDbDataAdapter m_daDataAdapter;
    DataTable m_dtPassword = new DataTable();
    public logon()
    {
        InitializeComponent();
    }
    private void btnCreateUser_Click(object sender, EventArgs e)
    {
        conn.Open();
        m_daDataAdapter =
            new OleDbDataAdapter("Select * From [Callcentre]", conn);
        OleDbCommandBuilder m_cbCommandbuilder =
            new OleDbCommandBuilder(m_daDataAdapter);
        m_daDataAdapter.Fill(m_dtPassword);

        DataRow drNewRow = m_dtPassword.NewRow();
        drNewRow["UserName"] = txtboxUserName.Text;
        drNewRow["Password"] = cipherText;
        m_dtPassword.Rows.Add(drNewRow);
        <code>m_daDataAdapter.Update(m_dtPassword);</code>
        m_rowPosition = m_dtPassword.Rows.Count - 1;

    }
}