title: MATLAB AppDesigner ListBox
body: <p>Good afternoon! </p>
  
  <p>I'm currently trying to build an app with MATLAB using App Designer. The goal is to be able to plot data using multiple GPX files, which I have successfully done. I'm curious as to how I should go about populating my Listbox. </p>
  
  <p>Is there a way for Listbox to get populated with filenames depending on the folder you select? </p>