Heidi - the answer depends on 2 things. (1) What stage of "in foreclosure" is it in and (2) what your states rules are when it comes to foreclosures.
Is the property showing up in a newspaper as going to be sold on the courthouse steps on a certain date? If so, you can show up and bid on it - but you will have to have a certain % downpayment and come up with the rest within a certain number of days. Also, if people are living in the home, you will have to handle the eviction per your state or county rules. If the home has already gone through foreclosure and is now owned by the bank (or lender), they have already set a price on it and you can make an offer just like any other home.
Check with a LOCAL Realtor or attorney.