HI,
Sending SMS on
VB will require different knowladge, if you want to use SDK tools for sending SMS Message on your
VB APP then I recommend
www.derdock.com,
www.activexperts.com and OXYGEN, sending SMS is very simple using those SDK, however if you dont want to spend $$$$ then develop your own AT COMMAND set, you can use GSM MODEM or Mobile that has a built-in GSM MODEM to send SMS directly in your code using Serial Com or MSCOMM.
Example AT+C:
AT <-| 'Communicate to MODEM
AT+CMGF=1 <-| 'Set Sending Property to Text
AT+CMGS="12345678" <-| 'Send message to #
>"MESSAGE HERE" <ctrl+z> 'Message to Send