I have many checkboxes so I create them in a for statement:
set nck 0
foreach lf $lfiles {
checkbutton $tfl.ck_$nck -text $lf -variable vck_$nck
$tfl window create end -window $tfl.ck_$nck -align top
$tfl insert end \n
set nck [incr nck]
}
where tfl is a text...
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