I want to control on and off ob check-button.

[Jason Miller]

On Wed, 30 May 2018 07:11:33 +0900, Kamuy Cikap <kamuycikap2016 at gmail.com> wrote:
> Hi every one.
> 
> I want to control on and off of check-button by clicking the button.
> but I can't it.
> 
> how do control it?
> 
..snip
>            (cbtn1 (make-instance
>                 'check-button
>                 :text "check button1"
>                 :variable :cbtn1_val
LTK assumes that you do not change the :variable parameter, so this will
prevent SETF from working.  You can either directly set the global variable you
have specified, or just use the default value for :variable.