Remove Grey Line Under Menubar (on Windows)?

Is there a way to remove the small grey line that appears below the menubar on Windows 10 programs? This line doesn’t seem to appear for non Xojo apps.

Here’s what the line looks like on a default Xojo app.

https://www.evernote.com/l/AB3bsAjqwKVP76uA8PYCyskQI2hIxUYbOvU