Hi does anyone have any information or suggestions for me?

My mom had a 5 year visa and came to visit US in June 2008. She was granted 6 months stay in her I-94 till Dec 2008. We applied for an extension in November but we just got letter today saying her extension was denied so she's supposed to leave the US within 30 days of this letter.

I heard that if your application for extension is denied then the 5 years visa also gets voided. Is this true? Would she be denied entry at the port of entry if she uses the visa to come back? How long does she need to wait before she comes back?

Time is running out and really need some suggestions from you if you have any idea.

Thank you!