Question : SMS with GSM modem

Windows XP
I need assistance writing some delphi code to send an sms message from my PC via a GSM (USB) modem.
Also if someone would clarify with me what is involved e.g is it just an applitaction to send SMS or do I need to create or use an SMS server?
Also I think sending SMS via GSM is charged by data rate where normal SMS are charged per SMS - is this correct
Sorry a little niave on this subject

Dave

Answer : SMS with GSM modem

1) Connect to your phone via some COM port component (supposing the phone is connected to USB port - check the port in Device Manager)

2) Send the following commands to the COM port:

-> AT
OK
-> AT+CMGF=1
OK
-> AT+CMGW="+3598881230000"
-> > Tst SMS messaging.
+CMGW: 1

OK
-> AT+CMSS=1
+CMSS: 20

OK

The lines that start with -> are the commands you have to send. The other lines are the response.

Since you are using the AT commands to send the SMS, you are not dialing a Data call. So SMS should be charges the regular way.