Public Class Patient
   Dim msFirstName As String
   Dim PhysiciansList As New Collection()
   Dim miPatientID As Integer

   Public Property FirstName() As String
      Get
         Return msFirstName
      End Get
      Set(ByVal Value As String)
         msFirstName = Value
      End Set
   End Property

   Default Public ReadOnly Property Physicians _
  (ByVal iIndex As Integer) As Physician
      Get
         Return CType(PhysiciansList(iIndex), Physician)
      End Get
   End Property

   Public Function Admit() As Boolean
      'add patient to database, notify billing, etc.
      Return True
   End Function
   Event LabResult(ByVal LabType As String)
   Public Property PatientID() As Integer
      Get
         Return miPatientID
      End Get
      Set(ByVal Value As Integer)
         miPatientID = Value
         'check labs database for this patient
         'if there are new lab results
         RaiseEvent LabResult("CBC")
      End Set
   End Property
End Class

Public Class Physician
   Dim miPhysID As Integer
   Public Property PhysicianID() As Integer
      Get
         Return miPhysID
      End Get
      Set(ByVal Value As Integer)
         miPhysID = Value
      End Set
   End Property

   Public ReadOnly Property Age() As Single
      Get
         'get Date of Birth (DOB)
         'calculate age from DOB
         'return age
      End Get
   End Property
End Class