Modem communication example

[iaguirre]

Could someone indicate me which classs should i use for it? And provide me a code example ussing it to communicate with a modem using AT commands?

I'm trying to send a SMS using a Siemens MC35 GSM modem attached to the
COM port. I'm able to send an SMS using the hyperterminal using the AT
commands.

Thanks

Sorry, the modem model is:

DIAMOND SupraExpress56e PRO

And the platform is windows.

Thanks