How to use Ping_GPRS?

I am a beginner in studing Open AT, who can tell me how can use the Ping_GPRS sample in Hyper Terminal?

You have juste to compile the application (if you use the last version of this sample). The commands, which are defined in the program, are “at+gset” to set the Apn, login and password and “at+ping” who allows to start the application and to give the IP adress to ping. The syntax is:
at+gset=“yourapn”,“your login”,“your password”
at+ping=1,“IP adress” //1 is used to start the application