I am using Liferay 6 for portal Development . During Creating Users under Liferay , i need to add some extra Fields also ?? Please let me know if this is ppossible or not ??
yes, you can add custom fields to user-entity and add them the field-values to user:
user.getExpandoBridge().addAttribute(...);
Custim field for the user-entity you can create by Control Panel Portal->Custom Fields or programmaticaly at liferay start.
Portal->Custom Fields
The data will be stored in ExpandoValue tables.
ExpandoValue