How to access Dictionary Structure in web dynpro(Where are you GS?) ?

Question

i had made one person Structure in Local dictionary.
i had already this type of value node in my context.
now i want to make an object of that type by code
       IPersonElement person =wdThis.wdGetContext().createPersonElement();
Then it is giving me error <i><u>type can not be resolved</u></i>.
Please Help Me....
Regards
Sunny.

Answer 1

I am learning WebDynpro from tutorials i have
  in that once they said me to create three views.
         1.Start View
         2.Table View.
         3.Detail View.
In start view 's context there are four elements
      Variable Name               Type
  1. First_Name                    String
  2.Last_name                      String
  3.Date_Begin                     Date
  4.Date_End                        Date
then In Controller 's Context I had also created all above elements with same type.
then i mapped all views with controller 's context.
start view 's all elements i map with contoller 's context.
then  i had created one structure in local data dictionary.
Name of Structure is Person.
and all above four attributes are also there.
Now i create one value node in Table View  type of that is person.
now i had also created binding of table with first_name and last_name.
then in coding
<i>
Public Void onPlugfromStartView( )
//@@begin onPlugfromStartView(ServerEvent)
String firstname =
wdThis.wdGetExc_UIController().wdGetContext().
currentContextElement().getCmpCtx_firstname();
String lastname =
wdThis.wdGetExc_UIController().wdGetContext().
currentContextElement().getCmpCtx_lastname();
Date date_begin =
wdThis.wdGetExc_UIController().wdGetContext().
currentContextElement().getCmpCtx_dateBegin();
Date date_end =
wdThis.wdGetExc_UIController().wdGetContext().
currentContextElement().getCmpCtx_dateEnd();
IPersonElement person =
wdThis.wdGetContext().createPersonElement();
<u><b>Above line is giving me Error that person can not be resolved</b></u>
person.setFIRSTNAME(firstname);
person.setLASTNAME(lastname);
person.setDATE_BEGIN(date_begin);
person.setDATE_END(date_end);
wdThis.wdGetContext().nodePerson().addElement(person);
//@@end
</i>
Please Help Me Sir.