I would like to know how can for the visitor to use the 18 at the beginning of the phone number field, ( Ionly want them to be able to send SMS to the Dominican Republic)

I assume you are using the HTTP Interface to provide SMS messaging sending from a Web form for you users.

When providing a Form to send SMS messages, you should submit the messages to us via a server-side script.

Your Form will submit the message to your server-side script (e.g. written in PHP, ASP, ASP.Net) . Your form will then submit the message to our SMS Gateway Service.

Using a server-side script will ensure the username and password can not be viewed on the client machine. The server-side script will also allow you to apply restrictions, such as only allowing message to be sent to international dialling code '18'.

Thanks, I was able to do it by limitting with the range 1809XXXXXXX and 1829XXXXXXX because in Dominican rep, we have 1829 also.
Would like to know also, how can Say that the message is sent, I see that I have a reponse that begins with ID10000????

You can receive delivery reports via a HTTP Post to your webserver.

You will need a server-side script (e.g. written in PHP, ASP, ASP.Net) on your webserver to receive the HTTP POST.

Please see the following link for more details:
http://www.intellisoftware.co.u...interface/receive%2Dsms/ 

How it works:
- When you send the message record the message id provided by our gateway
- When message is delivered our server will call your server-side script supplying the message id and new status

NOTE: HTTP Status report forwarding is configured on your account preference page (Forwarding tab).