private void btnStaffLogin_Click(object sender, EventArgs e)
{
frmStaffLogin frmStaff = new frmStaffLogin(this);
frmStaff.Show();
this.Visible = false;
}
public frmStaffUI(frmStaffLogin prev)
{
InitializeComponent();
this.lsbJourneys.DataSource = formatData(SetOfJourneys.Instance.getAllJourneys());
this.cboLineFilter.DataSource = RailMap.Instance.getLineNames();
this.lblPassengers.Text += this.lsbJourneys.Items.Count;
this.prevForm = prev;
}