'When did we last update a flipped image

      Private m_lastTickCountWhenImageFlipped As Integer

      Const DTIME_TO_FLAP_WINGS = 400      'Every 600 ms we should

      'flap our wings

      '–

      'These are the current image states for Hank

      '–

      Private Enum BorisImagesIndexes

       flyLeft1 = 1

       flyLeft2 = 2

      End Enum

      '–

      '[in] X,Y : Position to start Hank at

      '[in] worldHankInhabits : Playfield in which Hank lives

      '–

      Sub New(ByVal x As Integer, ByVal y As Integer, _

      ByVal world_I_Inhabit As PlayFieldManager)

       '–

       'Get the bitmaps for our character

       '–

       Dim col As Collection

       col = g_FlyingBirdPictureCollection()

       m_world_I_Inhabit = world_I_Inhabit

       ChangeMyMovementState(ModeOfMovement.Flying)

       'Start him off as falling.

       'Initialize our base class with these…

       MyBase.Initialize_DrawableMultiPlayfiedBitmapObject( _

      x, y, col, True)

       'Set the image index

       Me.CurrentFrameIndex = BorisImagesIndexes.flyLeft1

       'Set Boris' speed

       m_xVelocityBoris = -4

       m_y_accelerationBorris = 1

       '–

       'Set the collision rectangle for Hank

       '–

       Const BORIS_COLLISION_STARTX = 11

       Const BORIS_COLLISION_DX = 31

       Const BORIS_COLLISION_STARTY = 6

       Const BORIS_COLLISION_DY = 7

       Me.CollisionRectangle = New Rectangle( _

      BORIS_COLLISION_STARTX, BORIS_COLLISION_STARTY, _

      BORIS_COLLISION_DX, BORIS_COLLISION_DY)

      End Sub

      '–

      'This function should be called to bring about any change

      'of state

      'It sets/resets any other variables we need to when we deal

      'with state transitions

      '–

      Private Sub ChangeMyMovementState(ByVal newState As _

      ModeOfMovement)

       m_myModeOfMovement = newState

      End Sub

      '–

      'MOVE Boris

      '

      'This function is called to move the character on the screen