Here are the classes, structs, unions and interfaces with brief descriptions:

BXAuxFunctions	Performs basic image operations for the barcode decoder
BXDemoAppDelegate	Performs application delegation responsibilies for BXDemo
BXDemoViewController	Controls and Displays the view presented to the user for BXDemo
BXInterface	Manages access to the camera, executes callbacks, and executes Barcode Xpress library functions to perform recognition operations on imagery gathered from the camera
BXResult	Defines a barcode result returned by the iOS Barcode Xpress SDK
BXRuntime	Defines a class that handles the interactions between camera hardware, BXInterface (called by user programs), and the iOS wrapper around the native recognition library Barcode Xpress
BXThreadData	Defines a class to hold data that is transferred to/from the threads processing images using Barcode Xpress
BXThreadQueue	Defines a class that manages the threads using Barcode Xpress to perform recognition and decoding of images