/// <summary>
/// A private Event Handler that is called whenever the CloseEvent is fired.
/// </summary>
private void HandleCloseEvent()
{
// If the spreadsheet has been changed and hasn't been saved, begin the process the for
// closing without saving.
if (spreadsheet.Changed)
{
window.BeginCloseWithoutSave();
return;
}
// Otherwise, just close the current window.
window.DoClose();
}