How to create a self-contained custom control

[Jérôme Rosat]

I created a custom control.  I set the behavior of the group (the custom control) to a button script (I want no script in the group). 

If I copy the custom control in a new stack, i need to copy the button script too, or the stack that contains the button script as a substack of a new stack. 

How to make a self-contained custom control that I can simply copy and past where I want ? I tried to put the button script inside the group, but it doesn't work. If I copy the custom control in a new card, the behavior of the group still point to the "previous" card.

Any idea ? Thank you for your help.

Jérôme
Genève