BHO with no GUI

I need to find someone to create a BHO that our customers can download. It needs to identify a url the customer enters on their browser then query a database to see if that url is included in the database. If it is 1 need a 1 pixel window opened by a specific link provided in the database and once opened the 1 pixel window automatically closes. I also need the BHO to be able to append a Sub ID to the link in the database.