use variable in macro for date

Hi, I have a macro that I must change about 10 dates in as it autofilters by date in certain columns like this..

Selection.AutoFilter Field:=7, Criteria1:=">10/15/2010", Operator:=xlAnd, _
Criteria2:="<10/22/2010"


Is there a way to make criteria 1 use todays date, and criteria 2 use todays date + 7 days ?
do i need to use a variable for the system date ?