Hi, Everybody:

Thanks for giving me a very information and help..

About my code:
1. my code is no problem. The time is long enough to process key stroke.. no missing char and wrong char..

2. The problem is the card reader. the scan code they send out is not standard scan code for numeric digit.. they said that their card reader is ISO standard, so I wanted to get standard scan code (I use Set II), I always thought that my program is wrong, actually I got correct scan code, and what I need is to make a lookup table to change nonstandard scan code into standard one..

Regards

Frank