This .NET class wraps the AcValue::UnitType ObjectARX class.

Public Enum UnitType
  Angle = 2
  AngleNotTransformed = &H10000
  Area = 4
  Currency = &H10
  Distance = 1
  Percentage = &H20
  Unitless = 0
  Volume = 8
End Enum

public enum UnitType {
  Angle = 2,
  AngleNotTransformed = 0x10000,
  Area = 4,
  Currency = 0x10,
  Distance = 1,
  Percentage = 0x20,
  Unitless = 0,
  Volume = 8
}