Microsoft Speech SDK
SAPI 5.1
CSpEvent::PropertyName
CSpEvent::PropertyName returns the property name string from the event's lParam. The caller must make sure the event ID is either SPEI_PROPERTY_NUM_CHANGE and event type is SPET_LPARAM_IS_STRING, or event ID is SPEI_PROPERTY_STRING_CHANGE and event type is SPET_LPARAM_IS_POINTER.
const WCHAR* PropertyName( void ) const;