>>
>>I have seen experienced user who don't even know they can use the tab to move to next field - they just go for the mouse or touchpad for every field. Don't know if they ever ask themselves why is the enter key repeated on the keyboard, and always so close to the numeric keys.
>
>It might explain that this 'O' form closing was reported as a bug for 15 year old application used by multiple users. Container with the buttons placed on many forms, and this unexpected closing may happen in many of them, unless on a form opening focus on a control which accepts some input.
>I just never used a shortcut for a button myself, so found this behaviour surprising.

Something in KEYPRESS event?