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Retrieves a pointer to a specified interface on a component to which a client currently holds an interface pointer. This method must call IUnknown::AddRefon the pointer it returns.
HRESULT QueryInterface( REFIID iid, void** ppvObject );
Parameters
- iid
- Specifies the IID of the interface being requested.
- ppvObject
- Receives a pointer to an interface pointer to the object on
return. If the interface specified in
iidis not supported by the object,
ppvObjectis set to NULL.
Return Values
Returns S_OK if the interface is supported, S_FALSE if not.
Remarks
This member function implements the IUnknown::QueryInterfacemethod.