How can I add a "Was this Topic Helpful" statement

RoboHelp 11

I'm sorry if this has come up and I wasn't able to find the anser, but is there any way to add a statement: Was this topic helpful? Yes No to the end of a topic. It seems many Help programs, including your own, have this capability. If this does not exist within RoboHelp 11, how can it be added? (And, how is it compiled.)

This may be a very naive question, but I'm grateful for any help.

Thanks!