My point is simply that the component does not adhere to standard Windows input behaviour in its default configuration.

Are you saying I should detect key presses manually during a rectangle selection, and set CancelMouse if ESC is pressed on the keyboard?

On Windows, the standard behaviour of selection, dragging etc using the mouse is to cancel the operation if ESC is pressed.

This does not happen if I start creating a selection rectangle in a TChart. Pressing ESC does not cancel the operation.

thanks!