The IPersistStreamInit::IsDirty method checks whether an object has changed since it was last saved so that you can avoid losing information in objects that have not been saved. The dirty flag for an object is conditionally cleared in the IPersistStreamInit::Save method.
HRESULT IsDirty(void);
None.
<pipeline.h>
<pipecomp.h>
The method returns an HRESULT value.