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

CAnimation	Creates an Animation object Creates an Animation object to handle the timing of when an Animation should run. DISCLAMER - This is the animation class that I used in my PGG SDL assignment
CApp	Creates an App object that runs the application Creates an App object that runs the application
CAudio	Creates a Audio object to handle the SDL_Mixer
CCredits	Creates a Credits State. Creates a Credits State that inherits State
CEntity	Creates an Entity object Creates an Entity object with all the information about the Entity
CGame	Creates an Game object Creates an Game object which inherits State
CLose	Creates a Lose State. Creates a Lose State that inherits State
CMenu	Creates an Menu object Creates an Menu object which inherits State
CPause	Creates a Pause State. Creates a Pause State that inherits State
CPlayer	Creates an Player object that inherits Entity Creates an Player object that inherits Entity with a x velocity
CSpriteHandler	Creates an SpriteHandler object Creates an SpriteHandler object to deal with all of the applications sprites
CState	Creates an State object Creates an State object with virtual functions and the SpriteHandler * and width and height variables
CStateManager	Creates a StateManager object. Creates a StateManager object to be inherited. DISCLAMER - This is a modified version of the state handling system that I used in my PGG SDL assignment. This version is different however it is similar so I thought that I should mention it
CTexture	Creates a Texture for use with a renderer Creates a Texture from an image file, this can then be used with a renderer