problem with list box items show

Hi,

I have a problem with showing listbox.

In Listbox I added names of my group.

let say:
darma teja
krishna teja 
vamshi teja

my applications is installed in these 3 persons computers. These three computers username is Dat, Krt, Vat

Now my problem is:

in darma teja's application, I want to show (Highlight the name) his name in the list box.


Thanks,

Darma