How to get all the file's name in a folder

I've been wondering this for a long time. How do I get the names of all the files in a folder?

Add a list or combo box and use the files->load filelist action (with the param being the directory followed by * or *.* or *.bmp or whatever). The "Load Filelist" action should not be confused with the "Load list file" action (which loads a text file and each line of the text file is a line of the combo/list box).