Use gnome_url_show to display ghelp of other gnome application

In my small application, I try to show gnome help of other gnome application, and thanks to Juhaz on GimpNet-#gnome irc channel, I learned that how the ghelp URL looks like,

gnome_url_show ("ghelp:gedit#gedit-prefs", NULL),
/* #gedit-prefs is a section in the doc-book source */

or use the gnome-open utility to open it,

$ gnome-open ghelp:gedit#gedit-prefs

The nice piece is it will choose the proper ghelp file according to the running locale.