07-11-2012 01:29 PM
Hi and Welcome to the Community!
If your mobile service provider has such a facility, then you could use that...I don't know which, if any, of the carriers offer such an app...but you should ask them, since SMS is part of your voice services plan, not part of your BB Data Services.
Besides that, if you backup, using the RIM Desktop Software, to your PC, you could obtain a 3rd party app that would parse the resulting backup file and allow you to read the messages database(s) as of the moment they were backed up.
Natively, there is no way to actually "work with" the data that is backed up...in other words (and consistent with your question), there is no PC app to allow you to send/receive SMS from your PC, via your BB.