Does anyone know how to disable dates in the past using a calendar extender? 

Optimally, I'd like the dates to be non-clickable -- currently any date can be clicked and it can potentially be confusing.  The only prevention I have is adding a range validator to test for a past date.  Serves the purpose but the best thing to do is have past days unclickable.

Any ideas? 

anybody?  I can't be the only one who needs this functionality.  Haven't found much on it anywhere on the web.

Thx !!

My only solution to this has been NOT to use a CalendarExtender at all.

Instead, use a PopUpControlExtender with a ASP.net calendar embedded in its own UpdatePanel.  Then disable the dates in DayRender event.

 Protected Sub Calendar1_DayRender(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.DayRenderEventArgs)
        If e.Day.Date < Today Then
            e.Day.IsSelectable = False
            e.Cell.BackColor = Drawing.Color.LightGray
            e.Cell.ForeColor = Drawing.Color.White
        End If
    End Sub

 A lot more work.