IDirectPlay Interface Method Groups
Applications use the methods of the IDirectPlay interface to create DirectPlay objects and work with system-level variables. This interface supports the following methods:
Group management AddPlayerToGroup
IUnknown AddRef
Message management GetMessageCount
Player management CreatePlayer
Session management Close
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 DirectPlay object without affecting the functionality of the original interface.