Create UI compenents in the visual part (window) whose attributes and events can cause the script to run.

Build a user interface that includes a Multi-line Edit part and a Push Button part, so that it looks like the window in the previous section.

We will add an event-to-script connection for the push button so that, when it is selected, a dialog is displayed for choosing a file. After the user chooses a file, the script will read the file and display its contents in the Multi-line Edit part.