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Returns a pointer to a specified interface on a component to which a client currently holds an interface pointer. This method must use IUnknown::AddRefon the pointer it returns.
HRESULT QueryInterface( REFIID iid, void ** ppvObject );
Parameters
- iid
- [in] Specifies the IID of the interface being requested.
- ppvObject
- [out] 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.