Get layout fields values in web dynpro

Hello all,

I'm building a web dynpro where a user puts in a range of values, and when he clicks a button I present him a table with the table records which a certain field is in the given range.

Here's the button event code so far:

method ONACTIONSEARCH_PATS.

     DATA: lt_pat TYPE TABLE OF npat,

               lv_min_pat TYPE I,

               lv_max_pat TYPE I.

     *** In this section something should be added, I need you help for it, and then: ***

     SELECT * FROM npat INTO TABLE lt_pat

          WHERE patnr BETWEEN lv_min_pat AND lv_max_pat.

     node_pat = wd_context->get_child_node( name = 'PATIENTS' ). "that's the table node

     node_pat->bind_table( lt_pat ).

endmethod.

My question is: How do I get the values of the range? (I have two inputfields in the layout, one for minimun and one for maximum)

Thanks in advance.