i need help with Itemdata in visual basic!!

hi every1! i was wondering if any of you guys can help me out with a little problem that i have. i have created a form that has a list box witch will read from a .txt file and two labels, one will displayed a name and the other one will displayed a SS#. the .txt file has this info:
"diego maradona","012345678"
"lando parada","12345689"
and so and so. now, i already got the list box to upload the info from the .txt file but here is the problem, i have to make the program to show the name that has been selected on the list box in a label and the SS# that is related to the name in the other on! the thing is that i need to used ItemData manipulation and i have a lithe trouble doing it!
can someone be able to show me a little sample or at least with me some sites that can be help full to me!!!??? ???