Linking usaepay and Cpanel

Hello,

I would like to link usaepay and cpanel together so when the client
hits submit, the information of payment is recived for the script to take the
name of the client and insert it as their username for their hosting account in
whm and also the package they paid for the password should be randomly generated
then the client will be able to change it later it should all be sent in an email to the clients address.


My questions are:

Cpanel is wrritten in PHP right?


how do I move information to the WHM via the Hash key? what commands need to be sent?



Thanks for your help.

Best Reards,
Brill