Read Data's from the Form step type at run time

Hi Experts,

I have the 'Form' step type in my workflow and it will displays some values at the Run time. In this form I have one IO field called 'Comments'. So at the runtime manager can Enter the comments on it.

Now my need is I need to get the 'Comments' data from that form. How can I get this value?

Thanks in Advance,

Helps will be Appreciated..