My new gaming Laptop does not have a cd drive, how can I play the games?

I have the cases and cds for Generals, c&c 3 and Kanes wrath, but my new Laptop does not have a cd drive. Is there a way to use your code and download the game?

Kind of annoying. I was so used to things having a cd drive I didnt even check before I bought it.

Thanks,

Rob