How to Send and Read SMS using VB.net

  1. In Visual Studio, reference to the “MOBITEKSMSAPI9.dll“.
  2. Initialise the modem with 
    Modem.Init(com port number, optional PIN)
  3. Send a SMS (text format) with 
    SMS.SendSMSText(mobile number, message in text format)
  4. Or to send a SMS in unicode, use 
    SMS.SendSMSUnicode(mobile number, message in HEX format)

For more information, refer to Manual of MOBITEK SMS API version 9.