Develop api which can send SMS through mobile

[shahmanan]

Hello,

I want to develop API, which can send group SMS through attached mobile not with the help of internet.
I want to develop it in asp.net.

So, please guide me the way to create this application.

[Katty]

Kindly have a look at the following threads, you may get an idea how you can send group SMS through mobile:

1. How to send bulk SMS from windows mobile
2. How to send SMS to a group in HTC 8925
3. Send group text message on htc touch pro