Creating a list from a plain-text file in VBDOS...

Add something similar to the following within the form that has the list
box at form load (FORM.FRM:Form_Load)...

OPEN "PATH\TO\LIST.TXT" FOR INPUT AS #1
DO WHILE NOT EOF(1)
  LINE INPUT #1, LIST$
  L% = LEN(LIST$)
  IF RIGHT(LIST$, 1) = CHR$(10) THEN
    LIST$ = LEFT$(LIST$, L% -1)
  END IF
  IF RIGHT$(LIST$, 1) = CHR$(13) THEN
    LIST$ = LEFT$(LIST$, L% - 1)
  END IF
List_Example.ADDITEM LIST$
LOOP
CLOSE #1

Doing it this way essentially keeps you from having to use DIM and can
keep adding items to your list using a plain-text editor without also 
having to change the code.

The CHR$(10) and CHR$(13) parts are for CRLF issues, aka Carriage Return
and Line Feed. Most DOS text-editors use CR while Unix-like systems use 
CRLF.