What are the purposes of AddRef, Release and QueryInterface
functions




Answers were Sorted based on User's Feedback



What are the purposes of AddRef, Release and QueryInterface functions..

Answer / riddhi

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.

Is This Answer Correct ?    4 Yes 0 No

What are the purposes of AddRef, Release and QueryInterface functions..

Answer / anand

To bring the lost object identity back to the component
thru QueryInterface and manage the life-cycle of the
component thru AddRef and Release by reference counting.

Is This Answer Correct ?    2 Yes 0 No

Post New Answer




More COM DCOM Interview Questions

where can i use pmcmd commands of informatica

1 Answers  


hi,I have applied for NIC test plz if any one have test paper pattrn plz send me on "mn_mayank38@yahoo.co.in"

1 Answers  


How does a DCOM component know where to instantiate itself?

1 Answers  


How do you make a NET component talk to a COM component?

3 Answers   TCS,


What is a moniker ?

3 Answers  






what is mean by scintific,commercial and business applications? How they differ? Please answer me. Advance thanks.

0 Answers   Excel,


Futures of COM

3 Answers   MIT,


Define and explain COM?

8 Answers   Microsoft,


Explain JIT activation?

1 Answers  


When you call CoInitialize(NULL) function how it works internally.

8 Answers  


Explain object pooling?

1 Answers   HCL,


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

0 Answers  






Categories