What happens if a stylus is used with a non-touchscreen device?

Using a stylus on a non-touchscreen device typically has no effect because these devices are not designed to respond to touch input, including that from a stylus. Non-touchscreen devices rely on mechanical interfaces, such as a keyboard or mouse, to interact with software. Since there is no touchscreen technology involved, a stylus would not activate any features, nor would it affect the device's performance or functionality. Therefore, using a stylus would simply be futile, as there is no mechanism in place for the device to interpret any action from the stylus.