A check button is a button that can be either selected or deselected, and its selection is independent of the selections of any other buttons.
The class check-button inherits most of its behavior from the class button . Note that it is normally best to use a check-button-panel rather than make the individual buttons yourself, as the button panel provides functionality for handling groups of buttons. However, check-button can be used if you need to have more control over the button's behavior.
The following code creates a check button.
(setq button (capi:contain
(make-instance 'capi:check-button
:text "Press Me")
:process nil))
The button can be selected and deselected using this code.
(setf (capi:button-selected button) t) (setf (capi:button-selected button) nil)The following code disables and enables the button.
(setf (capi:button-enabled button) nil) (setf (capi:button-enabled button) t)