This .NET enum wraps the Acad::PointHistory ObjectARX enum. 

This enums represent bits in a history value that indicates what point filters had an effect on the point on a particular system event. 

The bits are independent from one another except for the following: 

• Only one flag out of Ortho and PolarAngle will be returned at any given callout.
• If NotDigitizer is set, then none of the following will ever be set: Gripped, CartSnapped, Ortho, and CyclingPt; but the rest of the flags are independent. In NotDigitizer events, the rawPoint, postGrippedPoint, cartesianSnappedPoint and orthoPoint values will all be identical.
• (History & CoordinatePending) is really a mask for any of the e[XYZ]Pending coordinate point values directly preceding CoordinatePending.

Public Enum PointHistoryBits
  Aligned = &H400
  AppFiltered = &H800
  CartSnapped = &H10
  CoordinatePending = &H70000
  CyclingPoint = &H40
  DidNotPick = 0
  ForcedPick = &H1000
  FromKeyboard = &H80000
  Gripped = 8
  LastPoint = 4
  NotDigitizer = 2
  NotInteractive = &H100000
  ObjectSnapped = &H80
  Ortho = &H20
  PickAborted = &H8000
  PickMask = &He000
  PolarAngle = &H100
  Tablet = 1
  UsedObjectSnapBox = &H4000
  UsedPickBox = &H2000
  XPending = &H10000
  YPending = &H20000
  ZPending = &H40000
End Enum

public enum PointHistoryBits {
  Aligned = 0x400,
  AppFiltered = 0x800,
  CartSnapped = 0x10,
  CoordinatePending = 0x70000,
  CyclingPoint = 0x40,
  DidNotPick = 0,
  ForcedPick = 0x1000,
  FromKeyboard = 0x80000,
  Gripped = 8,
  LastPoint = 4,
  NotDigitizer = 2,
  NotInteractive = 0x100000,
  ObjectSnapped = 0x80,
  Ortho = 0x20,
  PickAborted = 0x8000,
  PickMask = 0xe000,
  PolarAngle = 0x100,
  Tablet = 1,
  UsedObjectSnapBox = 0x4000,
  UsedPickBox = 0x2000,
  XPending = 0x10000,
  YPending = 0x20000,
  ZPending = 0x40000
}