private void TXT_F_NAME_KeyDown(object sender, KeyEventArgs e)
 {
     if (e.KeyCode == Keys.Enter)
     {
         TXT_L_NAME.Focus();
     }
 }
 private void CLEAR_DATA()
 {
     LBL_RESERVATION_ID.Text    = "N/A";
     DTP_RESERVATION_DATE.Value = DateTime.Now;
     TXT_F_NAME.Clear();
     TXT_L_NAME.Clear();
     TXT_EMAIL.Clear();
     TXT_TEL.Clear();
     TXT_NO_OF_ROOMS.Text = "0";
     TXT_ADULT.Text       = "0";
     TXT_CHILD.Text       = "0";
     LST_SELECTED_ROOM.Items.Clear();
     TXT_NIC_NO.Clear();
     DTP_ARRIVAL_DATE.Value       = DateTime.Now;
     DTP_DEPATURE_DATE.Value      = DateTime.Now;
     TXT_NO_OF_NIGHTS.Text        = "0";
     CMB_RESERVE_BY.SelectedIndex = -1;
     CMB_AGENT.SelectedIndex      = -1;
     LBL_AGENT_NAME.Visible       = false;
     // BTN_MAKE_NEW_AGENT.Visible = false;
     TXT_NOTE.Clear();
     TXT_F_NAME.Enabled = true;
     TXT_L_NAME.Enabled = true;
     TXT_TEL.Enabled    = true;
     TXT_EMAIL.Enabled  = true;
     LBL_SELECTED_ROOM_CONDITION.Text   = "N/A";
     LBL_SELECTED_ROOM_PRICE.Text       = "0.00";
     LBL_SELECTED_ROOM_DESCRIPTION.Text = "N/A";
     LBL_TOT_CHARGE_LKR.Text            = "0.00";
     LBL_TOT_CHARGE_USD.Text            = "0.00";
 }