zoho.crm.searchrecord

zoho.crm.searchrecord

Hi All,
I have   to   perform   a   function   for   assign  leads   using   the  LIFO   concept .

I am   using   the   crm.searchrecord   method   to   obtain   the  unasiggned  Leads .  
Order By   clause ,   can I   use   it   with   the   crm.searchrecord   method ?
How  do  I   get   more   than   200   records   using   crm.searchrecord ?
If I have 500 records, wich 200 records returns?

Thank & Regards
Alejandro