title: fill listbox in qt creator
body: <p>I'm working on Qt Creator and I am completely new to it. I want to have a list box which is loaded with the data when I run the program and I choose a value from the list box and press button and do some operation on that selected value.</p>
  
  <p>Is there any option for a list box in Qt creator? I have seen drag and drop listbox and listview but dont know which to use and how to use it . </p>
  
  <p>Also, where to write a code to load the list automatically?</p>
  
  <p>My project has many files like:</p>
  
  <ul>
  <li>mainwindow.h</li>
  <li>mainwindow.cpp</li>
  <li>mainwindow.ui</li>
  <li>mainwindow.c</li>
  <li>main.c</li>
  </ul>
  
  <p>Could someone help me with this listbox thing and also help with the syntax.</p>
  
  <p>Thanks </p>