maybellene - if you are using GUIDE (and I suppose even if you aren't!) you would need to use the listbox callback function which fires whenever the user selects something from the list box. For a GUIDE-created GUI, you would do
function listbox1_Callback(hObject, eventdata, handles)
listElements = get(hObject,'String'); % cell array of items
selectIdx = get(hObject,'Value'); % the index of the item selected by user
element = listElements{selectIdx}; % the element (id or whatever)
You would then convert element to the appropriate data type (probably an integer) and then build your SQL statement to query your database for the item whose ID is element. With the response, you would then update your static text fields using the handles structure (which has a handle to each text box).
