Keydown in Listbox Beep

Targets macOS
1

I have a listbox where I use the keydown event to capture some keystrokes where I then drawstring that text on the screen.
Which all works fine except I get a BEEP every time I press a key?

Is there a way to stop this?

Thanks
Martin

2

do you return true after handling the event ?

3

Thanks Jean just worked out I deleted that from the bottom.