Hi

I dont know what is apex.

I also know of barbecue java library that can produce barcodes if thats what you are looking for in svg format for the web.which you can embed in HTML page

But on the server side you need to use java or ASP to read barcode and fire a database query.
HTML would not serve the purpose.

sorry i havent heard of apex language.Can apex call servlets or java ?

regards
Hrishy