What are the purposes of AddRef, Release and QueryInterface
Answers were Sorted based on User's Feedback
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
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
|Is This Answer Correct ?||4 Yes||0 No|
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|
What is IUnknown? What methods are provided by IUnknown?
Define and explain COM?
How can would you create an instance of the object in COM
How do you make a NET component talk to a COM component?
Do COM keep track of all the object references(Accounting)?
Explain JIT activation?
what is mean by scintific,commercial and business applications? How they differ? Please answer me. Advance thanks.
How does a DCOM component know where to instantiate itself?
What are the different compatibility types when we create a COM component?
how you call a dll as a COM dll.
how do you know it is general dll or com dll
When you call CoInitialize(NULL) function how it works internally.