Lister Getstring

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  The  lister getstring  command is identical in function to
the  dopus getstring  command, the only difference being in
that the string requester will open over the specified lister.

  Example:


 /* ListerGetstring.dopus5 */ 
options results
address 'DOPUS.1'
lister new "SYS:"
handle = result
lister wait handle
lister getstring handle '"How old are you?" 2 "" OK|Cancel'
lister close handle
exit

  Any button selected from the requester will have it's value returned in the
 DOPUSRC  result variable, please refer to  dopus getstring  to see
what possible values it can hold.

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