The COM (Component Object Model) interface was designed in order to allow Windows applications
to access the GSM modem, send and receive SMS and WAP Push messages. All SMS API classes are accessible
from .NET languages (VB.NET, C# and others). Our .NET SMS API is free to use (you need to install
Headwind GSM Modem Driver first).
As a real application of this SMS API, you can look on the
Headwind SMS Outlook Add-In. The COM SMS API may be used even in PHP
(only on the Windows server), click here for a PHP SMS example.
The example of a client written in VB.NET is included in the distributive of Headwind GSM
Modem Driver, it can be found in the program menu. If you have some questions on using API or
developing some SMS application, do not hesitate to contact us.
COM library name:
- SMSDriver - main class, allowing to setup and connect the GSM
- SMSHandler - SMS handler, which may be used to receive SMS from
Headwind GSM modem driver;
- SMSMemory - class for the access to the GSM modem memory;
- SMSMessage - SMS/Push message class;
- USSDRequest - USSD request class.
All classes implement dual interfaces and support error info using the interface
A simple example
Public Class client
Dim drv As Object
Dim msg As Object
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
' Headwind GSM Driver class
drv = CreateObject("HeadwindGSM.SMSDriver")
' Port name
drv.PortName = "COM5"
' Connect to the modem
' Message object
msg = CreateObject("HeadwindGSM.SMSMessage")
' Recipient number
msg.To = "79214432123"
' Message body
msg.Body = "Hello from VB Client!"
' Send message