/// <summary>
        /// -1 = Error
        /// 0  = OK
        /// 1  = Near Paper End
        /// 2  = Paper not Present
        /// </summary>
        /// <param name="printerName"></param>
        /// <returns></returns>
        private int GetPrinterPaperLevel(string printerName)
        {
            int status = -1;

            string queryWmi = string.Format("SELECT * from Win32_Printer WHERE Name LIKE '%{0}'", printerName);

            using (ManagementObjectSearcher searcher = new ManagementObjectSearcher(queryWmi))
            using (ManagementObjectCollection coll = searcher.Get())
            {
                try
                {
                    foreach (ManagementObject printer in coll)
                    {
                        foreach (PropertyData property in printer.Properties)
                        {
                            if (property.Name == "PrinterState")
                            {
                                switch (property.Value.ToString())
                                {
                                    case "0":
                                        status = 0;
                                        break;
                                    case "131072":
                                        status = 1;
                                        break;
                                    case "131088":
                                        status = 2;
                                        break;
                                    default:
                                        break;
                                }
                            }
                        }
                    }
                }
                catch(Exception ex)
                {
                    txtLog.AppendText(ex.Message + "\n");
                }
            }

            return status;
        }