Help on Developing a Time Attendance System with use of Barcodes Printed on ID Cards

I am trying to develop a Time Attendance System with use of barcodes printed on id card, I think it can be achieved in the following way, but i dont know which tool to use. I have this abstract steps already outlined.

Step 1: I want to add each user information to a data base which will have a unique id that will be used to generate the barcode.

Step 2: There will be a Standby barcode reader that will read the barcode, the application logic will decide which user owns the data and check the time the user clocked in, the application then write the time clocked in into the database or to a txt file or any where it wants to write to.

Step 3: At day end, A report will be automatically generated everyday and saved for collection by the admin.

The system seems simple, but I just know i can do it but I dont know how to go about it. Can any one please help. I really need to do this. I dont know if there is any tool that can be recommended or available for this system to work