hello. Alan:
following your code, I have got something, but there is a small problem now.

I have said before, There is a card reader on the keyboard, when I pressed the single key, It is correctly displayed.
but when I swipe the card, first time it display nothing, when I swipe the card second time, it displays first time data...
it is very strange.. but I am also very happy that I could get something....

Thanks.

Frank