Command invocation format

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>>-ISPEXEC--LIST--BUFNAME(dialog-variable-name)----------------->

                                   .-SINGLE-.   
>--LINELEN(line-length)--+------+--+-DOUBLE-+------------------->
                         '-PAGE-'  '-TRIPLE-'   

>--+----------+--+----+----------------------------------------><
   '-OVERSTRK-'  '-CC-'