I am a newbie and am not able to make qtp to choose a certain name in the bottom of the list (which is not visible, since its at the bottom of the list and the list box/table window open does not show it)

When i manually enter the user name in the text box provided above this name list/table, it automatically searches and narows the name to a single name in the list as the user types in the complete name)
Following the above step, the user would have selected a button to select that name, However in QTP how do i select that name before i click the button since even though i write the name in the search box, while running qtp, the search does not happen to single the desired name in the list.