udm_get_res_param() returns
result parameter value on success,
FALSE on error.
res - a link to result
identifier, received after call to
udm_find().
param - parameter
identifier, may have the following values:
UDM_PARAM_NUM_ROWS - number of received found links
on the current page. It is equal to UDM_PARAM_PAGE_SIZE
for all search pages, on the last page - the rest of
links.
UDM_PARAM_FOUND - total number of results matching
the query.
UDM_PARAM_WORDINFO - information on the words found.
E.g. search for "a good book" will return "a: stopword,
good:5637, book: 120"
UDM_PARAM_SEARCHTIME - search time in seconds.
UDM_PARAM_FIRST_DOC - the number of the first
document displayed on current page.
UDM_PARAM_LAST_DOC - the number of the last document
displayed on current page.