APTR handle = hw_OpenCatalog(STRPTR catalog, struct hwTagList *tags);
catalog
in the user's
language and return a handle to it. If the catalog is unavailable in the
user's language, NULL
will be returned.
When you are done with the catalog, you must call hw_CloseCatalog() to close it. See hw_CloseCatalog for details.
NULL
NULL
on error