public ReturnForm()
{
InitializeComponent();
//turetu is duomenu bazes sukrauti itemus ir issaugoti sarase +
dataHelper = new ItemDataHelper();
materials = dataHelper.GetAllMaterials();
eaDataHelper = new EventAccountDataHelper();
phidgetScanner = new PhidgetHandler();
customerRFID = null;
invoiceDataHelper = new InvoiceDataHelper();
//Activate and Open RFID +
try
{
phidgetScanner.OpenRFIDReader();
phidgetScanner.myRFIDReader.Tag += new TagEventHandler(ChangeTagOnForm);
}
catch { MessageBox.Show("No RFID reader detected."); }
}