Yes.
NI provide some Windows utilities that can help you with this. One of the VI's is precisely "Call WinHelp.vi". You can download these utility VIs from the following link:
(32-bit)
http://zone.ni.com/devzone/devzoneweb.nsf/opendoc?openagent&74DDE683A1AFF6988625683A000C0D73&cat=034E59A8530E09DF862568900018707A
Good Luck!
Enrique Vargas"
www.vartortech.com