tk caret window ?-x x? ?-y y? ?-height height?
Sets and queries the caret location for the display of the specified Tk window window. The caret is the per-display cursor location used for indicating global focus (e.g. to comply with Microsoft Accessibility guidelines), as well as for location of the over-the-spot XIM (X Input Methods) or Windows IME windows. If no options are specified, the last values used for setting the caret are return in option-value pair format. -x and -y represent window-relative coordinates, and -height is the height of the current cursor location, or the height of the specified window if none is given.