2D Graphics time event.
  IsTimeEventTypeSupported | Gets a value indicating whether the specified type can be used. | 
  SetTimeEventType | Type of time event graphics: line, marker or text. | 
  IsVisible | Opt whether to display time event graphics. | 
  TimeEventType | Type of time event graphics: line, marker or text. | 
  TimeEventTypeData | Time event data. | 
  TimeEventTypeSupportedTypes | Returns an array of valid choices. | 





