Yes, but the standard advanced research doesn't propose the search for classes....and I want to know if I could write my advanced research, or if the advanced research of eZ Find exist some where.....
I have this dropdown in this template.
But it's this template extension/ezwebin/design/ezwebin/templates/content/advancedsearch.tpl
that I see. And in this template I doesn't have the dropdown.
I try desactivate the template (of ezwebin), in settings/siteaccess/<my siteaccess>/site.ini.append.php . And for the advanced search I have dropdown (standard). But for a search (no advanced), the eZ Find search isn't applicate, (it's ezwebin).
Well why would it be strange if you need the functionality from standard design :)
You can try just to rename/delete the advancedsearch.tpl in ezwebin, it should then pick up the standard one.
Or even better: override the ezwebin extension with your custom ezwebin extension and place the right advancedsearch.tpl in it (that way you don't touch the original ezwebin)