IDirectSoundBuffer Interface Method Groups
Applications use the methods of the IDirectSoundBuffer interface to create DirectSoundBuffer objects and set up the environment. The methods can be organized into the following groups:
Information GetCaps
IUnknown AddRef
Memory management Initialize
Play management GetCurrentPosition
Sound management GetFrequency
All COM interfaces inherit the IUnknown interface methods, which are listed in the "IUnknown" group above. These three methods allow additional interfaces to be added to the DirectSoundBuffer object without affecting the functionality of the original interface.