Reusing BPS exits with input parameters in IP 7.3

Hello All,

I am trying to reuse existing BPS exit Function in the new IP functionality. I am trying to follow the steps mentioned in the document below:

How to Create a Planning Function in Business Intelligence Integrated Planning that Calls BPS Exits (NW7.0)

But this document works only if there are no parameter values passing to the BPS exits. Can  someone please explain how to pass values to a BPS exit if we create planning function as mentioned in the above document.

Appreciate the help.

Regards,

Satish M