ShowNone Property
Specifies whether entering null date|time is allowed in a DatePicker|TimePicker control

Syntax:

ShowNone <lValue>

Sample:

      @ 230,310 DATEPICKER Date_4 ;

            VALUE CTOD("01/01/2001") ;

            TOOLTIP "DatePicker Control ShowNone" ;

            SHOWNONE

If SHOWNONE clause is used and shownone checkbox is unchecked:

- DATEPICKER return an empty date

- TIMEPICKER return an empty string