The only way for your sister to receive her green card by staying in the US is if she qualifies under §245(i) of the US immigration law. That provision of law requires that she be the beneficiary (or the daughter of a beneficiary) of an I-130 petition, I-140 petition, or Labor Certification filed before April 30, 2001.
If no application was filed on her behalf (or on behalf of one of her parents) before that date, she unfortunately will not be able to take advantage of winning the lottery.
Attorney Edward Weiner
E-mail : E.Weiner@immigration-aux-usa.com
Phone : + 1 (617) 889-0215
Internet Site :
http://www.immigration-aux-usa.com