IDirectDrawClipper Interface Method Groups
Applications use the methods of the IDirectDraw interface to create DirectDraw objects and work with system-level variables. The methods can be organized into the following groups:
Allocating memory Initialize
Clip lists IsClipListChanged
Handles GetClipList
IUnknown AddRef
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 DirectDrawClipper object without affecting the functionality of the original interface.