Okay, so what I need to do is to write C# code, to integrate into an existing application.
I will (most likely) be using a Nokia 7230 mobile phone, and I\'m willing
GSMComm is a useful C# library for this, it comes with a bunch of samples/tools to mess around with as well.
I get the impression you going to buy a Nokia handset specifically to handle your SMS stuff? If so, you could just buy a GSM Modem (depending on your location) they are cheaper, don't include extraneous features and are not dependent on using manufacturer specific software.