Send MMS from VB.NET

Posted by on Feb 9, 2012 in Support Blog

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A VB.NET example for sending MMS messages via NowSMS has been posted at the following link:

For a C# .NET version of this example, please see the related article Send MMS from C# .NET.

MMS examples for other environments (PHP, Java, command line) can be found at

As discussed in Sending MMS Messages with NowSMS, one of the easiest ways to interface with NowSMS for sending MMS messages is to use what we refer to as the Proprietary URL Submission interface.  This interface is the one used for sending messages via the forms in the built-in NowSMS web interface.  Sending an MMS message via this interface is a matter of using an HTTP POST to submit MMS content in the form using the MIME type “multipart/form-data”.  This technique is often referred to as “HTTP File Upload” and is associated with web pages that have a “Browse” button that allows files to be uploaded.

There’s a great C#.NET HTTP File Upload library at:

A direct link to download the library is here (only the UploadHelper component is needed):

In the event that this link does not work in the future, we have archived a copy of the library at the following link:


application/ k)


The following VB.NET code example uses code from that library to send an MMS message:

(Note: This example can be downloaded at

Imports System.Text

Imports System.IO

Imports System.Net

Imports System.Web

Imports System.Web.Services

Imports ClassLibrary1

Imports ClassLibrary1.Krystalware

Imports ClassLibrary1.Krystalware.UploadHelper

Imports ClassLibrary1.Krystalware.UploadHelper.HttpUploadHelper

Imports ClassLibrary1.Krystalware.UploadHelper.MimePart

Imports ClassLibrary1.Krystalware.UploadHelper.StreamMimePart

Imports ClassLibrary1.Krystalware.UploadHelper.StringMimePart

Imports ClassLibrary1.Krystalware.UploadHelper.UploadFile

Imports System.Collections.Specialized

Public Class Form1

    Public Sub SendMMS()

        ' Set the following variables as appropriate for your system. 

        ' URL that points to NowSMS web interface 

        Dim url As New Uri(" ")

        ' Valid username/password for account defined in NowSMS under "SMS Users". 

        Dim username As [String] = "testuser"

        Dim password As [String] = "testpass"

        ' Images & Files to be included in the message. 

        ' First parameter is filename and path. 

        ' Second parameter must be MMSFILE 

        ' Third parameter should be MIME type 

        Dim files As UploadFile() = New UploadFile() {

         New UploadFile("c:\mms\tts.mp3", "MMSFILE", "audio/mpeg"),

         New UploadFile("c:\mms\image.png", "MMSFILE", "image/png")}

        ' Create additional form parameters for sending MMS 

        Dim form As New NameValueCollection()

        ' "PhoneNumber" variable contains recipient phone number 

        form("PhoneNumber") = "09059999999"

        ' "MMSFROM" variable contains sender phone number or address

        '  (Note: Ignored when sending via modem) 

        form("MMSFROM") = "09058888888"

        ' "MMSSUBJECT" variable contains subject line for message 

        form("MMSSUBJECT") = "test subject"

        ' "MMSTEXT" variable contains test to appear in message (optional) 

        form("MMSTEXT") = "this is a test message"

        ' Send the request to NowSMS, creating an HttpWebRequest and 

        ' then use HttpUploadHelper to send files in multipart/form-data format 

        Dim req As HttpWebRequest = DirectCast(WebRequest.Create(url), HttpWebRequest)

        Dim credCache = New CredentialCache()

        credCache.Add(url, "Basic", New NetworkCredential(username, password))

        req.Credentials = credCache

        Dim resp As HttpWebResponse = HttpUploadHelper.Upload(req, files, form)

        ' Read the HTTP response and echo to console 

        Using s As Stream = resp.GetResponseStream()

            Using sr As New StreamReader(s)

                Dim response As String = sr.ReadToEnd()



            End Using

        End Using

    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click


    End Sub

End Class


Additional MMS options can be included using the form(“variablename”) = “value” syntax shown in the above example. The other options/variables are described in more detail in

For comments and further discussion, please click here to visit the NowSMS Technical Forums (Discussion Board)...