The following classes provide support for tear-off interfaces:
- CComTearOffObject Implements IUnknown for a tear-off interface. 
- CComCachedTearOffObject Implements IUnknown for a "cached" tear-off interface. 
The following classes provide support for tear-off interfaces:
CComTearOffObject Implements IUnknown for a tear-off interface.
CComCachedTearOffObject Implements IUnknown for a "cached" tear-off interface.