[Closed] Spinner Problem

Hello.

I need your help.

I made a script with a spinner and a listbox.

I just want when i click on a selection in the listbox the value come in the spinner and when i change the value of the spinner the value of the selection in the listbox change too.

My code.

ListboxItems = #("1","5","14","24","26","36")
Utility listmod "List modifier"
(
label espbet " " height:3
listbox pass "Items:" items:listboxitems
spinner offset "Modify :" type:#integer
label espbet01 " " height:2

on pass selected LinkFrameNo do 
(
    offset.value = listboxitems[LinkFrameNo] as integer
    
    if offset.value != listboxitems[linkframeNo] as integer then offset.value = listboxitems[LinkFrameNo] as integer
     
)--end on pass

on offset changed value do
(
    pass.selected LinkFrameNo = value
)--end on offset
)--end utility

There is an error in my code.
if i erase "on offset ... end on offset"
I get the value of the selected item in the spinner but when i modify the value in the spinner nothing happen in the listbox.

Do you have an idea to do it ?
Thank a lot for your help. :)