1) By system file I assume you mean Windows HTML help, so that is what this answer pertains too. First you would have to develop the html help files on your own, possibly with a 3rd party application like WinHelp or HTMLHelp.
2) Then you can easily launch the HH.exe (Windows HTML help display) with the appropriate help file showing by calling the function ShowHTMLHelp from within your applications code (found in the Programmer's Toolbox library, toolbox.fp in cvi\toolslib\toolbox).
Jason Foster
Applications Engineer
National Instruments
www.ni.com/ask