Sms.. Help in vb.net

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N[e]tt[e] 0 Newbie Poster

21 Years Ago

Hi..anyone here have sms gateway coding (vb.net)for windows application??
i need a free service..meaning i will hope my application can able to send sms to my customer for latest news/promotions. how can i do so? :sad:

.net:vb.net

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Latest Post 18 Years Ago Latest Post by joshua__lim

Dani AI

Generated 10 Months Ago

Practical options for and anyone who wants a VB.NET Windows app to send customer SMS: truly free, reliable bulk SMS is effectively unavailable — most real solutions are pay-per-message or pay-per-number, though many providers give small trial credits. For low volume or testing, consider a paid API with a trial; for production promos you should expect per-message fees and possibly registration costs. (twilio.com)

The simplest, most maintainable route is a cloud SMS provider (HTTP/REST API + provider .NET SDK). Providers give example code, helper libraries and delivery receipts so the app only needs to make one HTTP call or call the provider SDK — this is easier than writing modem code or building SMPP plumbing. This is what and were pointing toward (vendor DLLs / webservice calls). Example (generic, works with most HTTP-style providers — replace apiUrl/apiKey with the provider values):

Imports System.Net.Http
Imports System.Threading.Tasks

Public Async Function SendSmsViaHttpAsync(apiUrl As String, apiKey As String, toNumber As String, message As String) As Task(Of Boolean)
    Using client As New HttpClient()
        client.DefaultRequestHeaders.Authorization = New System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", apiKey)
        Dim payload = New Dictionary(Of String, String) From {
            {"to", toNumber},
            {"from", "SENDER"},
            {"body", message}
        }
        Dim resp = Await client.PostAsync(apiUrl, New FormUrlEncodedContent(payload))
        Return resp.IsSuccessStatusCode
    End Using
End Function

See provider guides for VB/.NET samples and SDKs. (twilio.com)

If avoiding third parties is required, a GSM modem + AT commands (AT+CMGF, AT+CMGS, etc.) will work; and mentioned this. It needs a SIM, careful SerialPort handling, command/response parsing, and a service/queue for reliability (do not host modem I/O in IIS). Watch for modem prompts, +CMS/+CME errors, SIM PIN and registration delays. Good AT-command references and modem tutorials explain the exact sequence and pitfalls. (diafaan.com)

For true high-volume delivery use SMPP via an aggregator or carrier connection (not free). Also avoid relying on carrier email-to-SMS gateways — carriers have been shutting those down (AT&T ended its gateway on June 17, 2025) so email-based tricks are brittle. If sending promotions in the US, plan for A2P rules (10DLC) and brand/campaign registration. (smpp.org)

Short checklist: pick a paid API for fastest, most reliable build; use a GSM modem only for low-throughput or offline setups; use SMPP for scale and talk to an aggregator for pricing; always implement opt-in/opt-out and follow carrier compliance rules.

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jamello 158 Posting Whiz in Training

19 Years Ago

Hi..anyone here have sms gateway coding (vb.net)for windows application??
i need a free service..meaning i will hope my application can able to send sms to my customer for latest news/promotions. how can i do so? :sad:

This you can use. I registered with this outfit and I could buy smses and send sms to any phone through my website. The following code shows the format. It's really simple. Any company you register with will give you the dlls to install on your machines giving you access to their gateways. Best of luck. Get back to me for further questions

'use the intellisoftwares' gateway
'objIntelliSMS = New IntelliSMS
'objIntelliSMS.PrimaryGateway = "https://www.intellisoftware.co.uk"
'objIntelliSMS.BackupGateway = "https://www.intellisoftware2.co.uk"
'objIntelliSMS.Username = "xxxxxxxxxxxxxxx"
'objIntelliSMS.Password = "xxxxxx"
'Try
' objIntelliSMS.SendMsg(strCellFoneNo, "This sms operation  is successful", "www.MySite.com")
' lblError.Text = "SMS Sent successfully to " & strCellFoneNo
'Catch Ex As Exception
' lblError.Text = "Error!: SMS could not be sent to " & strCellFoneNo
'Finally
'End Try

mmangai 0 Newbie Poster

19 Years Ago

This you can use. I registered with this outfit and I could buy smses and send sms to any phone through my website. The following code shows the format. It's really simple. Any company you register with will give you the dlls to install on your machines giving you access to their gateways. Best of luck. Get back to me for further questions
hi jamello
how much this bulk gateway costs.bcoz i need it for my project.approximately we can send 200 a year.so it s not affordable.
then where do we get those service providers?

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mm77 0 Newbie Poster · Answer 1 · 2005-06-06T10:49:06+00:00

hi , i am muhtu. i also involve the same kind of project..

can u explain me ur project? did u found any solution??

if i can i will help u

mm77 0 Newbie Poster · Answer 2 · 2005-06-06T10:56:34+00:00

hi friends,

i created a multipls instaces of one windows form.

but i want to pass some information to an particular instances..which means if i open two instaces , i want to pass only one instace form. how to i differenciate that one...

pls i need ur help urgently...

thin_master 0 Newbie Poster · Answer 3 · 2007-05-30T09:00:03+00:00

Free can be difficult. I dont know of any free service. But you can use a gateway using SMPP or you can get a easy url based account for sending SMS. The latter way is easy cos all you have to do is call a URL given by the provider with the message and the number as parameters and the message will get delivered.

Another method is to use a GSM modem and AT commands.

http://www.daniweb.com/techtalkforums/thread79473.html

check this thread.

jamello 158 Posting Whiz in Training · Answer 4 · 2007-07-05T16:24:07+00:00

This you can use. I registered with this outfit and I could buy smses and send sms to any phone through my website. The following code shows the format. It's really simple. Any company you register with will give you the dlls to install on your machines giving you access to their gateways. Best of luck. Get back to me for further questions
hi jamello
how much this bulk gateway costs.bcoz i need it for my project.approximately we can send 200 a year.so it s not affordable.
then where do we get those service providers?
Why don't you try the link I gave in the original post. The pricing and costs are explicit on the web site ().
Successful? get back to me. Peace:cool:

rodrod 0 Newbie Poster · Answer 5 · 2007-07-18T13:02:31+00:00

Hi guyz...here is a sample code to send SMS (to the world)...please (any junior/senior) poster update me with you feedbacks...

private void Send_Click(object sender, System.EventArgs e)
{
   try
      {
    SmsTest.com.webservicex.www.SendSMSWorld smsWorld =  
         new SmsTest.com.webservicex.www.SendSMSWorld();
            smsWorld.sendSMS(txtEmailId.Text.Trim(), 
                    txtCountryCode.Text.Trim(), 
                    txtMobileNo.Text.Trim(), txtMessage.Text);
        lblMessage.Visible = true;
        lblMessage.Text="Message Send Succesfully";
      }

    catch(Exception ex)
    {
        lblMessage.Visible = true;
        lblMessage.Text="Error in Sending message"+ex.ToString();
    }
}

joshua__lim 0 Newbie Poster · Answer 6 · 2007-09-28T16:53:13+00:00

If you got a phone with a data cable, you can try using this freeware, it comes with HTTP API and a sample HTML form to post the SMS - http://www.visualgsm.com/products_vgsmlite.htm

Sms.. Help in vb.net

Dani AI

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