The win95 cd program has the capability to recognize a specefic music CD when it is entered. You are then able to type in the group & songs so that they can be called up from the database next time the cd is put in the cd-rom. I can handle the database side, but from my understanding there is a windows api call that will either find a certain number or have a formula for generating a certain unique number for each cd. I need to know what this call is, how to use it to generate/find the number on the music CD. So that it will recognize that it is a new CD the first time a certain CD is entered in the CDrom and will recognize a cd that is already in the database.If you have heard of Custom File in a home or Car CD player, basically, that is what I am trying to accomplish.Thanks.