coolzero 0 Newbie Poster

i'am a newbie here, i have a listview and i want to have the sum of a a particular column..
here's the fields that would appear on the listview:
name number of days
Bill 5
Anne 10
total 15

i want to have the "total" to appear on a textbox, but i dont know what to do.

Please somebody help!!!:X