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This tutorial illustrates how to send and receive SMS from Visual Basic 6 (VB6) using the SMSLibX ActiveX component (DLL library).
The tutorial shows how to:
The reference environment is Microsoft Visual Basic 6.
A minimal expertise on Visual Basic programming is required.
Now you're ready to use SMSLibX objects and methods directly in your source code.
The following Visual Basic (VB6) source code might be used into a VB6 form in order to send and receive SMS messages. With few modifications this code can be inserted in a VB6 class module too.
WithEvents clause is essential in order to catch events raised by the SMSModem object.
' Declare SMSModem object Public WithEvents Modem As SMSModem ' Send SMS Private Sub cmdSendMessage_Click() ' Open modem communication Set Modem = New SMSModem Modem.LogTrace = True Modem.OpenComm ModemType, ModemPort, , smsNotifyAll ' Send message Call Modem.SendTextMessage(PhoneNumber, MessageText) End Sub ' Receive SMS by event Private Sub Modem_MessageReceived(Message As SMSLibX.SMSDeliver) MsgBox "New message received from " & Message.Originator & ":" _ & vbCrLf & vbCrLf & Message.Body, _ vbInformation, "New message received" End Sub
For a brief introduction on SMSLibX usage we recommend the Quick start section from SMSLibX Help.
SMSLibX is fully integrated into the Microsoft development environment:
The following examples provided with VB6 source code are available for download:
Both examples are pre-configured for simulation mode (they do not send real SMS).
Once you got them working on yoir PC, you can configure them in order to use your actual GSM modem/phone by opening the main form source code (View > Code menu) and modifying the 'TO DO' items.
If you experience some troubles, please refer to the "Troubleshooting" section.
Please read these notes carefully – they are very important for a good SMSLibX programming practice!
If your VB6 application makes use of MsgBox and InputBox, please
note that VB6 suppresses events from timers, forms, controls and ActiveX
components while one of these dialogs is open.
Events are not simply delayed but definitively suppressed (please see Microsoft Knowledge Base 76557 article).
Due to this disagreeable behaviour, if a MsgBox is open your application may loose events notifying received messages - and any other event generated by SMSLibX.
As work-around, we suggest redefining the VB6 MsgBox function and replacing it with the MessageBox
API from Windows (which does not suppress events: please see Microsoft Knowledge Base 76557 article
A concrete MsgBox re-definition example is available in the source code of the Example2.
If your VB6 application cycles over a list of SMS messages to be sent - or
performs some other time-consuming operations - then you should provide a
statement in your loop (or time-consuming operaton).
This will permit SMSLibX to continue raising its events in real-time (such as received messages, delivery reports and modem status events).
Moreover, your SMSLibX event listeners (the code you write inside an event procedure) should never contain time-consuming operations, since SMSLibX relies on the event calling thread for further message capture and notification.
When opening the examples you might experience some troubles due to missing SMSLibX registration on your system.
Should the following errors appear:
please restore SMSLibX references as explained in the first part of this tutorial.
Please refer to the Troubleshooting section of SMSLibX Help.
Mar 18, 2013 - Given the numerous requests, we've made available a last stock of this item (discontinued in 2010). Contact us if interested.
- Working teams
Contact your customers and mobile co-workers by SMS.
- Mobile marketing
Contact your audience with friendly SMS communication.
- Services and associations
Contact service subscribers and associates by SMS.
- Commercial consultants
Remind fiscal deadlines to your customers with an SMS.
- Medical offices
Send appointment reminders to your patients by SMS.
Keep in contact with parents and students by SMS.
Different ways to send and receive SMS messages:
Create a message list and send it to multiple recipients with SMSList.
Integrate SMSLibX ActiveX into your web pages (ASP or other server-side technologies) to send and receive SMS from your site.
With SMSLibX you can add SMS sending and receival capabilities to Excel worksheets and Access databases.