What is IUnknown? What methods are provided by IUnknown?

Answer Posted / mahesh

Iunknow is the base interface for any com component.
it supports three methods
addref()
release()
queryinterface()

Is This Answer Correct ?    8 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Is dcom dead?

617


Suppose we have object b and aggregated object c (in- proc server), created by b. Can you access any interface of b from c? What?s the difference between aggregated and contained objects?

501


What is the difference between aggregated and contained objects?

563


What are queued components?

582


Which namespace do the classes, allowing you to support COM functionality, are located?

2098






How to create an instance of the object in COM?

569


Can I use com components from .net programs?

599


Once I have developed the com wrapper do I have to still register the com in registry?

652


How do we create dcom object in vb6?

687


What is reference counting in com?

547


Does .net replace com?

555


Can I use .net components from com programs?

602


Define and explain about COM?

606


What is the use of com component in .net?

589


What is dcom?

533