The Media Kit Table of Contents

Introduction Real-Time Allocation Functions		Global Functions Message Formats Constants and Defined Types
Application level BMediaRoster BMediaFiles BMediaFormats BMediaFile BMediaTrack BSound BSoundPlayer BMediaEncoder »BMediaBufferEncoder BMediaDecoder »BMediaBufferDecoder	Node level BMediaNode »BBufferConsumer »BBufferProducer »BControllable »BFileInterface »BMediaEventLooper   (howto) »BTimeSource BBufferGroup BBuffer »BSmallBuffer BTimedEventQueue BTimeCode BMediaAddOn	Parameters BParameterWeb BMediaTheme BParameterGroup BParameter »BNullParameter »BContinuousParameter »BDiscreteParameter

Something that the Be Book doesn't mention is that most hook-functions in the media kit are called with pointers that are guaranteed to be non-NULL. This is because the pointers that are passed to the functions, usually point into fixed-length structs that are used internally to pass data between nodes. In many code-examples on the Be website, almost no checks for NULL-pointers appear, and this is not just to simplify the example but also because it's not really necessary.
--Jac Goudsmit on May 16, 2001