I'm still not understanding how to get SF to update data if I add the IBusinessBindable interface to a control. My initial understanding was that I needed an event that changed after the bound property changed. I.e. if my control had a property called MyProperty that I wanted to be bindable (i.e. the property would be loaded with data by the BO and changes to the property would update the BO), I'd need a MyPropertyChanged event:
' The property that can be bound via SF
Private _myProperty As Integer
Public Property MyProperty() As Integer
Get
Return _myProperty
End Get
Set(value As Integer)
_myProperty = value
Me.OnMyPropertyChanged()
End Set
End Property
' The event that occurs after the property is changed
Public Event MyPropertyChanged As EventHandler
Protected Overridable Sub OnMyPropertyChanged(e As EventArgs)
Raiseevent MyPropertyChanged(Me,e)
End Sub
However, this didn't work. 
Next I noticed that in the SF RichTextbox, you implemented the INotifyPropertyChanged interface, so I tried that. I created an event called PropertyChanged and raise that event in the set of any properties I want to be bindable. Again it didn't update the BO.
How do I get the BO to know when the property changes, so it updates itself with the new data?