Did it accidentally get deleted somehow, or did the laptop die? If the first option:
http://www.piriform.com/recuva.
I'm going to use this opportunity to make a quick point:
Always back up your critical files. If your team only has one programmer, then something like
Dropbox,
Google Drive, or
Skydrive should work perfectly fine for you. If your team has more than one experienced programmer, and especially if you're using the text-based languages (Java, C++, or Python), you can used a more advanced backup solution such as Subversion or Git (both of which are built into Netbeans and WindRiver IIRC) along with Github or Bitbucket, which provide advanced features that can make life a bit easier if you know how to use them.
Always keep a copy of your working code backed up somewhere, somehow. Flash drive, different computer, the cloud, repository hosting website, doesn't matter. Hard drives fail, computers fall. You never know what might happen.