That's the answer, thank you. In the meantime I had discovered that if I ran the executable from DOS I could see the output.
Thanks again, John

Windows 10. Where should I see the result of Print?
I have the IDE, an upper pane with a vertical bar halfway across which does not appear to be significant. A lower pane 'Results Window"
Print "Hello World" compiles and runs but I cannot see where it is printed.
John