Blackberry service application

Design a blackberry background service application that listen to and can be accessed from java, device will be connected on usb. on demand is required that: This service get screenshots of device (JPG) on a fast manner and store them on pc (like javaloader get screenshot) keypress input injection: from java keycode will be sent, and effectively the key must be pressed on device (control) full source code must be provided, easy extensible architecture to add more functionalities to this service needed.