public event OnValueChanged
Prototype:
OnValueChanged(Sender, EventData)
Parameters
	
		
			Sender
		
		
			the event firing control
		
	 
	
		
			EventData
		
		
			unused for this event
		
	 
 
Description:
Event fired when the 
Value property changes.
 
Return value:
This event can close the application by returning MSG_APPLICATION_QUIT. Any other return value will be ignored.