How can I receive parameters in the first program working with isCOBOL Web Direct?

The parameters must be added to the end of the URL and they are received by the COBOL program as chaining parameters.
For instance, this URL:

   http://localhost:8180/wd2/zk/IsMainZK?PROGRAM=MYPROG&PARAM=ABCDEFGHILMN123456789

will pass the value "ABCDEFGHILMN123456789" to the COBOL program that contains this code:

   ...
       WORKING-STORAGE SECTION.
       01 hlink.
          05 p1 pic x(3).
          05 p2 pic x(9).
          05 p3 pic 9(4).
          05 p4 pic 9(5).
   ...
      PROCEDURE DIVISION chaining hlink.
   ...