What Are The Purposes Of Addref, Release And Queryinterface Functions

1.	What Are The Purposes Of Addref, Release And Queryinterface Functions?
Answer» Query Interface METHOD is used to get the pointer to the interface specified in one of the parameters of this method. Client then USES this pointer to call the method of the component. ADDREF and Release are used to increase and decrease the count of the instance of component LOADED in MEMORY respectively. when the count reaches zero the component is unloaded. Query Interface method is used to get the pointer to the interface specified in one of the parameters of this method. Client then uses this pointer to call the method of the component. AddRef and Release are used to increase and decrease the count of the instance of component loaded in memory respectively. when the count reaches zero the component is unloaded.

What Are The Purposes Of Addref, Release And Queryinterface Functions?

Answer»

Query Interface METHOD is used to get the pointer to the interface specified in one of the parameters of this method. Client then USES this pointer to call the method of the component.

ADDREF and Release are used to increase and decrease the count of the instance of component LOADED in MEMORY respectively. when the count reaches zero the component is unloaded.

Query Interface method is used to get the pointer to the interface specified in one of the parameters of this method. Client then uses this pointer to call the method of the component.

AddRef and Release are used to increase and decrease the count of the instance of component loaded in memory respectively. when the count reaches zero the component is unloaded.

Discussion

No Comment Found

Related InterviewSolutions

How Do You Make A Net Component Talk To A Com Component?
What Are Queued Components?
C Is Aggregated By B, Which In Turn Aggregated By A. Our Client Requested C. What Will Happen?
How Does A Dcom Component Know Where To Instantiate Itself?
What Kind Of Components Can Be Used As Dcom Servers?
What Are The Different Compatibility Types When We Create A Com Component?
Do Com Keep Track Of All The Object References (accounting)?
How To Call A Dll As A Com Dll?
Define And Explain About Com?
Differentiate Normal Dll To Com Dll?