title: WP7 TimePicker choose time in 24h format
body: <p>Is there a way to get WP7's TimePicker to allow the user to select the time in 24 hour format?  If I set TimePicker.ValueStringFormat to "{0:HH:mm:ss}" it displays in 24h format, but when I click it the input time is still 12h format (with AM/PM).  Can TimePicker be configured to scroll 0-23 instead of 1-12 with AM/PM?</p>