Event to signal to the control/widget that the value has been changed.
Eto (in Eto.dll) Version: 2.5.3-dev
event EventHandler<EventArgs> ValueChanged
Event ValueChanged As EventHandler(Of EventArgs)
abstract ValueChanged : IEvent<EventHandler<EventArgs>,
Controls should call GetValue(Object)
when this is raised
so that they can set the state of the control to match the value provided.