As I tried to intimate, cforms ii doesn't do everything one could ever imagine "out of the box". You will have to add your own php code to do these extra things.
Note the description of the API (Application Programming Interface):
Do you require more flexibility in your forms? Then create and deploy forms at run-time. Mind you, to use this feature it requires basic and possibly more advanced PHP knowledge, examples you’ll find in the HELP! section of plugin admin pages.
This will essentially allow you to pull data from an external source and feed it into your ad-hoc created form fields. I’ve deliberately not included any sort of external data administration, as everyone will have a different file or database table syntax. Any of the fields described in the HELP! section can be created at run-time and shown online. Minor drawback: this works only in non-Ajax mode.
Post processing of user input
cforms comes with several adjustable functions (and examples) that allow you to filter and modify user input on the fly as well as trigger an action after user input has been accepted, you can even change cforms settings during run-time, such as page redirection & admin email. All great capabilities to incorporate your own application and business logic!