/// <summary>
        /// The user has selected a different Focuser.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void cmbxModel_SelectedIndexChanged(object sender, EventArgs e)
        {
            // Focuser model and indexer.
            Focuser.ModelNumberEnum ModelNumber = (Focuser.ModelNumberEnum)cmbxModel.SelectedItem;
            Properties.Settings.Default.FocuserModel = ModelNumber.ToString();

            Focuser.FocuserDataType model;
            if (m_Focuser.m_FocuserTypes.TryGetValue(ModelNumber, out model))
            {
                SetFocuserParameters();
            }
        }