May 17, 2010 08:04 AM|olamikhx|LINK
You may have a look at the following links, you will also need to register for gateway so that your message can be routed through the gateway to your recipient.
You will be required to register and buy credit, the site has VB.net script that u can use to integrate your ASP.Net to their gateway. there are options like HTTP, SMTP, COM, SOAP that yu can use to connect to their gateway.
here is a sample VB.Net from the site and it works fine.
Dim client As WebClient = New WebClient
' Add a user agent header in case the requested URI contains a query.
client.Headers.Add("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR
client.QueryString.Add("text", "This is an example message")
Dim baseurl As String = "http://api.clickatell.com/http/sendmsg"
Dim data As Stream = client.OpenRead(baseurl)
Dim reader As StreamReader = New StreamReader(data)
Dim s As String = reader.ReadToEnd()
Hope it assist you