- reference count
- The manner in which a Component Object Model (COM) object controls its lifetime. When an object is created, its reference count is set to 1. When a pointer is assigned to point to one of the object's interfaces, the object's reference count is incremented. When the interface connection is destroyed, the reference count is decremented. The object is destroyed when the reference count reaches 0. All pointers to interfaces on that object are then invalid. See IUnknown Interface for more information.
- root frame
- A frame in Direct3D that has no parent frame. A frame at the top of a hierarchy of frames. The root frame contains the entire set of objects that make up a scene.
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