This .NET class wraps the AcEdSSGet::AcEdSSGetFlags ObjectARX enumeration. 

This enumeration contains the flag settings for an entity selection process. The settings are used by methods that add entities to or remove entities from a subSelectionSet.

Public Enum SelectionFlags
  Duplicates = 2
  FailedPickAuto = &H200
  NestedEntities = 4
  Normal = 0
  PickfirstSet = &H20
  PickPoints = 1
  PreviousSet = &H40
  SinglePick = &H10
  SubEntities = 8
  SubSelection = &H80
  Undo = &H100
End Enum

public enum SelectionFlags {
  Duplicates = 2,
  FailedPickAuto = 0x200,
  NestedEntities = 4,
  Normal = 0,
  PickfirstSet = 0x20,
  PickPoints = 1,
  PreviousSet = 0x40,
  SinglePick = 0x10,
  SubEntities = 8,
  SubSelection = 0x80,
  Undo = 0x100
}