private void txtIATA_TextChanged(object sender, EventArgs e)
        {
            if (txtIATA.Text.Length == 9)
            {
                IATA iata = GetAllFirmModulesBL.GetIATA(txtIATA.Text);

                if (!string.IsNullOrEmpty(iata.Code))
                {
                    txtIATA.Text    = iata.Code;
                    txtIATA.Enabled = true;
                    txtOffice.Text  = iata.Office;
                    txtPCC.Text     = iata.Pcc;
                    txtOffice.Focus();
                }
                else
                {
                    MessageBox.Show("El número de IATA no existe, debe ser dado de alta", Resources.Constants.MYCTS, MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtIATA.Text    = string.Empty;
                    txtOffice.Text  = string.Empty;
                    txtPCC.Text     = string.Empty;
                    txtIATA.Enabled = true;
                    txtIATA.Focus();
                }
            }
        }
        /// <summary>
        /// Handles the TextChanged event of the txtTA control.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The event<see cref="System.EventArgs"/> instance containing the event data.</param>
        private void txtTA_TextChanged(object sender, EventArgs e)
        {
            if (txtTA.Text.Length == 6)
            {
                TA ta = GetAllFirmModulesBL.GetTA(txtTA.Text);

                if (!string.IsNullOrEmpty(ta.Code))
                {
                    txtTA.Text   = ta.Code;
                    cmbType.Text = ta.Type;
                    txtPCC.Text  = ta.Pcc;
                    cmbType.Focus();
                }
                else
                {
                    MessageBox.Show("El número de TA no existe, debe ser dado de alta", Resources.Constants.MYCTS, MessageBoxButtons.OK, MessageBoxIcon.Information);
                    txtTA.Text   = string.Empty;
                    cmbType.Text = string.Empty;
                    txtPCC.Text  = string.Empty;
                    cmbType.Focus();
                }
            }
        }