C#

childLogin = new FrmLogin();
     childLogin.ShowDialog(this);
     if (childLogin.DialogResult == DialogResult.OK)
     {
         stripLblLoginAs.Text = "Login As : " + childLogin.Username;
     }

public class DatabaseManager
{
    public OleDbConnection connection;
    public OleDbDataAdapter dataAdapter;
    public DataSet dataSet;
    public string connectionString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=ebms.mdb";

    public bool GetDataConnection()
    {
        try
        {
            connection = new OleDbConnection(connectionString);
            dataAdapter = new OleDbDataAdapter("select * from staff", connectionString);
            dataSet = new DataSet();
            dataAdapter.Fill(dataSet, "Staff");
            return true;
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error : " + ex.Message);
            return false;
        }

    }
}

public partial class FrmMain : Form
{
    DatabaseManager dbm = new DatabaseManager();

if (this.dbm.GetDataConnection())
{
    MessageBox.Show("Connection Established");
}
else
{
    MessageBox.Show("Connection Failed");
}