How to send SMS from VB 6.0 via Internet

At  last I got time to write one of important topic here.

How to send SMS from VB6.0 via Internet

When I got this work to implement in our project, first I got very excited but when I tried to search this topic on Internet via Google etc, I had to struggle a lot to find the correct method.

Well We can send SMS from VB6.0 by two ways

1. By using Internet (this method is explained Here )
2. By Using Mobile Phone (Not explained here)

After long time, I finally got chance to provide download link to demo project which is below
The downloaded file is rar compressed. In case you don't have software to extract it, just download wrar320 or higher version free of cost from the internet via Google etc.

Please note: You need some valid Developer API.

Please either contact company or create an demo account to get developer API from the site, I had mentioned Below.

Download SMS Demo project

Download SMS Demo project Setup without code 2.67mb

Here I would try to explain HOW TO SEND SMS FROM VB via INTERNET

1. The very first thing is that U need to contact to any SMS Providers (e.g. in India some are
1. http://www.mysmsmantra.com/
2. http://www.smscountry.com/ (click on Register now button at top)
3. http://www.freesmsapi.com/ (click on Sign Up button at top)
4. http://mirchsms.com/bulk_sms.html (please contact at no. provided at top or email at bottom to request to get trial sms api ). I also tested it very well, you may also refer my name to them.)
2. Now get the Developer API from these SMS Providers either by purchasing account or if you want to test before purchasing then you can ask these SMS Providers to provide you a free trial account so that you can test their service) 
1. Below is one of the example of Developer API
2. 'http://bulksms.mysmsmantra.com:8080/WebSMS/SMSAPI.jsp?username=demouser&password=399501089&sendername=DM&mobileno=919999999999&message=Hello"
3. Now just use the following code in your VB program to send SMS
1. Dim WinHttpReq As Object
2. Dim sResult As String, strURL As String
3. Set WinHttpReq = CreateObject("Msxml2.XMLHTTP")
4. strURL="http://bulksms.mysmsmantra.com:8080/WebSMS/SMSAPI.jsp?username=demouser&password=399501089&sendername=DM&mobileno=919999999999&message=Hello"
5. 'Replace the Message & MobileNo with the no to whom you want to send SMS
6. With WinHttpReq
7.       .Open "GET", strURL, False
8.     .Send
9.     sResult = .responseText
10.  End With
11. MsgBox "Status of Sent SMS  is=" & sResult
4. Some Important notes We should keep in mind while Sending SMS
1. Check the Maximum Message Length that you can send as allowed by your SMS Service Providers
2. Check whether you have to make your Message encode according to WWW standards, confirm it from your SMS Providers
3. While sending data over internet/network, some letters can not be sent as it is, they need to be converted to send them to internet. e.g " &"  can not be send as it, it needs to be converted to send it over internet.
1. URL encoding converts characters into a format that can be transmitted over the Internet.
2. For more information see following link
1. http://www.w3schools.com/html/html_urlencode.asp
4. Always Allow the access of your program to get connected with Internet which would be asked by the Firewall of your OS or Antivirus program else you could not send SMS 
5. As sending SMS may take time, you should do appropriate changes in your program to show user that your program is busy in sending SMS like change Mouse Pointer Shape from normal to HourGlass & after sending make it normal.

After long time, I finally got chance to provide download link to demo project which is below
The downloaded file is rar compressed. In case you don't have software to extract it, just download wrar320 or higher version free of cost from the internet via Google etc.

Please note: You need some valid Developer API.

Please either contact company or create an demo account to get developer API from the site, I had mentioned above.

Download SMS Demo project

Below is a sample which I used in my project 

Private Sub cmdSMSTest_Click()
    'validate information
  'Message(max 160 Chars)


    Me.MousePointer = 11 'Hourglass
    Call SendMySMS(myMob, myMsg, True, Trim(Me.txtSMSDeveloperAPI),  Trim(Me.txtSMSMobileText), Trim(Me.txtSMSMsgText))
    Me.MousePointer = 0 'Default


End Sub


Public Function SendMySMS(ByVal myMob As String, ByVal myMsg As String, Optional ByVal IsTest As Boolean = False, Optional ByVal UserDeveloperAPI As String = "", Optional ByVal MobText As String = "", Optional ByVal MsgText As String = "", Optional ByVal AskToSend As Boolean = True, Optional ByVal ShowStatus As Boolean = True) As Boolean


'Here you write your code

Following is the sample code to test it--- but of course you need Developer API to use the code


Private Sub cmdSMSTest_Click()
    'validate information
    'Message(max 160 Chars)
    If Me.chkSMSActivateService.Value = 0 Or Len(Me.txtSMSDeveloperAPI) < 1 Or Len(Me.txtSMSMobileText) < 1 Or Len(Me.txtSMSMessageText) < 1 Then
        MsgBox "Please enter all setting values"
        Me.txtSMSDeveloperAPI.SetFocus
        Exit Sub
    End If
 
 
    Dim s As String
    Dim myMob As String
    Dim myMsg As String
 
    s = "Enter Mobile nos separated by , then put @ now write your msg not more than 160 chars"
    s = s & vbCrLf & "e.g 9971745868,9811994797@Hi this is test sms by ABM Infotech"
    s = InputBox(s, , "9971745868,9811360935@Hi this is test sms by ABM Infotech")
    myMsg = Mid(s, InStr(1, s, "@", vbTextCompare) + 1)
    If Len(myMsg) > 155 Then
        myMsg = Left$(myMsg, 155)
    End If
    myMob = Mid(s, 1, InStr(1, s, "@", vbTextCompare) - 1)
 
    Me.MousePointer = 11 'Hourglass
    Call SendMySMS(myMob, myMsg, True, Trim(Me.txtSMSDeveloperAPI), Trim(Me.txtSMSMobileText), Trim(Me.txtSMSMessageText))
    Me.MousePointer = 0 'Default

End Sub

Public Sub SendMySMS(ByVal myMob As String, ByVal myMsg As String, Optional ByVal IsTest As Boolean = False, Optional ByVal UserDeveloperAPI As String = "", Optional ByVal MobText As String = "", Optional ByVal MsgText As String = "", Optional ByVal AskToSend As Boolean = True, Optional ByVal ShowStatus As Boolean = True)
    'myMob,myMsg, Optional IsTest,UserDeveloperAPI , MobText, MsgText,AskToSend ,ShowStatus As Boolean = True
    On Error GoTo ArunKakkarErr
 
    Dim sMobText1 As String
    Dim sMobText2() As String
    Dim sMobText3() As String
 
    Dim sResult As String, strURL As String
    strURL = ""
 
    If IsTest Then
     
    Else 'retrieve settings from db
         '''SMS_IsActivate        1,0 SMS_DeveloperAPI SMS_MobileText SMS_MessageText
         If UserPreferencesGetValue("SMS_IsActivate", "0") = "0" Then Exit Sub
         UserDeveloperAPI = UserPreferencesGetValue("SMS_DeveloperAPI")
         MobText = UserPreferencesGetValue("SMS_MobileText")
         MsgText = UserPreferencesGetValue("SMS_MessageText")
    End If
 
 
    'To put 91 etc for more than one mobile nos
    sMobText2 = Split(MobText, "=")
    sMobText1 = ""
    If UBound(sMobText2) > 0 Then
        sMobText1 = sMobText2(1) '2nd element
    End If
    If Len(sMobText1) > 0 Then
        sMobText3 = Split(myMob, ",")
        If UBound(sMobText3) > 0 Then
            myMob = ""
            For i = LBound(sMobText3) To UBound(sMobText3)
                If myMob = "" Then
                    myMob = sMobText3(i) '1st Mobile No
                Else
                    myMob = myMob & "," & sMobText1 & sMobText3(i) '2nd, 3rd, 4th Mob No
                End If
            Next i
        End If
    End If
 
 
    strURL = UserDeveloperAPI & "&" & MobText & myMob & "&" & MsgText & myMsg
 
    If AskToSend Then
        If MsgBox("Do you want to send SMS?", vbYesNo + vbDefaultButton1) = vbNo Then
            Exit Sub
         
        End If
    End If
    Dim WinHttpReq As Object
 
    Set WinHttpReq = CreateObject("Msxml2.XMLHTTP")
    'strURL = "http://bulksms.mysmsmantra.com:8080/WebSMS/SMSAPI.jsp?username=demouser&password=399501089&sendername=DM&mobileno=919999999999&message=Hello"
    'Replace the Message & MobileNo with the no to whom you want to send SMS
    With WinHttpReq
          .Open "GET", strURL, False
        .Send
        sResult = .responseText
    End With
    If ShowStatus Then MsgBox "Status of Sent SMS  is=" & sResult
   
    Exit Sub
ArunKakkarErr:
    MsgBox ("Sorry there is some error while sending sms" & vbCrLf & Err.Description)
 
End Sub

Public Function UserPreferencesGetValue(ByVal SettingName As String, Optional ByVal DefaultValue As String = "", Optional ByVal myTable As String = "UserPreferences", Optional ByVal NameCol As String = "SettingName", Optional ByVal ValueCol As String = "SettingValue")
    Dim s As String
    s = ""
    Dim rptRs As New ADODB.Recordset
    If rptRs.State Then rptRs.Close
    rptRs.Open "select * from " & myTable & " where " & NameCol & "='" & SettingName & "'", Scon, adOpenStatic, adLockReadOnly
    If rptRs.EOF = False Then '  if already present then return
        s = IIf(IsNull(rptRs!SettingValue) = False, rptRs!SettingValue, DefaultValue)
    Else ' if not present then return default
        s = DefaultValue
    End If
    UserPreferencesGetValue = s
End Function

Public Sub UserPreferencesSetValue(ByVal SettingName As String, ByVal SettingValue As String, Optional ByVal myTable As String = "UserPreferences", Optional ByVal NameCol As String = "SettingName", Optional ByVal ValueCol As String = "SettingValue")
    Dim rptRs As New ADODB.Recordset
    If rptRs.State Then rptRs.Close
    rptRs.Open "select * from " & myTable & " where " & NameCol & "='" & SettingName & "'", Scon, adOpenStatic, adLockReadOnly
    If rptRs.EOF = False Then '  if already present then update
        Scon.Execute "Update " & myTable & " set " & ValueCol & "  = '" & SettingValue & "' where " & NameCol & " = '" & SettingName & "'"
    Else ' if not present then insert
        Scon.Execute "Insert into " & myTable & " (" & NameCol & "," & ValueCol & ") values ('" & SettingName & "','" & SettingValue & "')"
    End If
End Sub

Public Sub AKakkar_Error(Optional ByVal Source As String = "")
    Dim s As String
    s = "Sorry for the inconvinence, There is some error"
    s = s & vbCrLf & "ABM Source=" & Source
    s = s & vbCrLf & "Error No=" & Err.Number
    s = s & vbCrLf & "Error Description=" & Err.Description
    s = s & vbCrLf & "Error Source=" & Err.Source
    MsgBox s, vbCritical
End Sub

Note:::>>>> If someone need sample program, just mail me, I would like to help you.

Now after learning it you can explore it in details to get more powerful options for your programs.
Best of Luck for Programming.