If my user presses F1 key, I need to dedect for html help control:

1. are the required files present in hard disk
2. is the control registered in registry.

I think that the best way is to use the code:

on error lError = .t.
ob = createobject( ??? )
on error
if type('ob')#'O'
  .. register it
  endif

Which class name need to be passed to createobject() for this check
or is there a better way to dedect the installation on html help control ?