how to connect a wifli shield to a arduino and send a message to a mobile phone

hi,
we are a dutch school in the netherlands.
we are buying a fire warner and we've got need a explain how we can connect and scripting the arduino.
we know something about scripting, but not at all of the arduino etc

can anybody help us ??
:stuck_out_tongue_winking_eye:

A Wifi shield allows you to connect to an EXISTING WiFi network. Do you have one that you can connect to?

If so, you can send messages to the mobile phone from the Arduino just like you would from a PC connected to the same WiFi network.