Busy event. Will be fired regularly during long-drawn operations. If end value will be zero, the meaning is: long-drawn with unknown end time. Close long-drawn operation by calling with parameters (-1,-1).
// Java public TGIS_BusyEvent getBusyEvent(); public void setBusyEvent( TGIS_BusyEvent _value );
// Oxygene public property BusyEvent : TGIS_BusyEvent read write;