If using a service isn't a wise thing to do, than other solutions are welcome too. I need to build it from scratch anyway.
The following is what I want to accomplish:
A customer is visiting my trainingfacility. He is checking-in by using his magnet-card.
The magnetcardreader is attached to a serial-com port.
Here is the part the service comes in:
The service-application identified that data is send by the com-port.
The send data contains an identificationnumber of the customer.
The service will update a database to register that the customer is present. (if he scans a second time he will be checked-out).
Also the service will show a windows-popup containing the name and picture of the customer.
The popupscreen will disapear automatically after 3 seconds.
What would be a good way to implement this behaviour?
Can anybody give me some example or guidelines?