WPF Indexed search

Question

Hello Im stuck while passing the advanced criteria to search indexed folder ..the following is the code im using can yu please suggest how to pass advanced criteria to search the indexed folder.. string query = @"SELECT System.ItemPathDisplay FROM rajneesr2.SystemIndex " + @"WHERE scope ='file:" + sDir + "' and FREETEXT('" + value + "')"; in the above want to enable advanced criteria like exactly matches the Free Text (Value) or modified between ..or contains etc..