A DateBlock allows values to be placed in a one-2-one mapping with
org.openharmonise.swing.datefield.DateFormatBlock objects.
Therefore each element of a date value can be manipulated.
author: Matthew Large version: $Revision: 1.1 $
Constructs a new DateBlock.
Parameters: formatBlock - Format block that this DateBlock is associated to Parameters: nStartPos - Position in date string that this value starts at Parameters: sValue - Current value