Protected Overridable Sub OnValueChanged( _
   ByVal oldValue As Nullable(Of Date), _
   ByVal newValue As Nullable(Of Date) _
) 

Dim instance As UXDateTimePicker
Dim oldValue As Nullable(Of Date)
Dim newValue As Nullable(Of Date)
 
instance.OnValueChanged(oldValue, newValue)

protected virtual void OnValueChanged( 
   Nullable<DateTime> oldValue,
   Nullable<DateTime> newValue
)

protected procedure OnValueChanged( 
    oldValue: Nullable;
    newValue: Nullable
); virtual; 

protected function OnValueChanged( 
   oldValue : Nullable,
   newValue : Nullable
);

protected: virtual void OnValueChanged( 
   Nullable<DateTime> oldValue,
   Nullable<DateTime> newValue
) 

protected:
virtual void OnValueChanged( 
   Nullable<DateTime> oldValue,
   Nullable<DateTime> newValue
)