Your screen shot looks like you might be using VB.Net. If so, you posted in the wrong forum section.

Other than that, you can search the forums, this question has been asked many many times and there are a lot of examples on how to do it. What you will need to do is load the entire file to one list, then parse the data according to type (If contains "[" then go to list 1, etc...).

EDIT: One more comment, with this, instead of using two listboxes and two text boxes, I would rather choose one Listview with 4 columns (Day, Subjcet, Start Time, End Time) that way all data will be visible at once, you dont have to handle click events for lists to load appropriate data etc.