What are the purposes of AddRef, Release and QueryInterface
functions




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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.

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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.

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