.net - Visual Basic Iterating Over a ListBox with an Event Listener -

i have listbox containg list of items,i wondering how create handler can iterate listbox whenever event happen.
have following code read file listbox.

private sub load_file_to_listbox(byval sender system.object, byval e system.eventargs) handles load_file_to_listbox.click     dim r new io.streamreader("c:\users\resu\desktop\test.txt")     while (r.peek() > -1)         lb1.items.add(r.readline)     end while     r.close() end sub 

here event handler code:

private sub button2_click(byval sender system.object, byval e system.eventargs) handles button2.click     textbox1.text = " "     textbox1.text &= listbox1.selecteditems.item(i).tostring     = + 1 end sub 

i declared global variable keep track of next item in listbox. want read next item listbox , put textbox whenever button2 clicked.

kindly me in modifying code make work.

if understand correctly, problem lies following line of code:

'this line of code looks @ of items have been  'selected in list box, , out of of selected  'items select item @ index i. textbox1.text &= listbox1.selecteditems.item(i).tostring 

because code looking @ selected items only , not all items code not behaving expect. instead, use following line of code:

textbox1.text &= listbox1.items(i).tostring()