Description
string 
udm_get_res_param ( resource res, int param)
    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.