Help class

I have the next problem: I would like to open an specific topic since this instruction: help.ShowHelp(control, helpfile, navegator, parameter). Where parameter I supose that send something to my file *.chm to link the topic i want to open.

My question is, how to use that parameter inside my file*.chm and my application for open an specific topic.

I would appreciate any help, thanks...

MSDN

Click the link, don't send me hateful private messages, when you haven't even verified the help I have provided!