Break PickObject()

Hello,

Is-it possible to break the pickobject of multiple selection ?
I have a checkbutton with a pickobject (see code)
When I uncheck this button I want this stop pickobject (#escape)
Thanks for your help

on myButton changed state do
(
if (state == true) then
(
local objs = #()
num = 1
objs = pickobject count:#multiple
for i in objs do
(
i.name = (num as string)
num+=1
)
myButton.checked = false
)
else
(

// HERE THE BREAK ACTION... ???
// I TRY return #escape and lots of things, but nothing works
)
)