:?
What do you expect? You come here with a big-fat logo wasting a lot of forum space and asking us to do your homework. If you want to know how to develop a wxWidgets app, you truly should start reading the free book I was telling you. There is no "drag-and-drop" mechanism to create a button and showing a folder with files. You need to code a little to achive this. Everything else is nonsense.
But we can't do everybodies homework here... or do you want to do mine to keep the work-load equal?
Again - look at the link I was telling you. It *does* include the information you were asking about otherwise I wouldn't have told you.