Get_File_Box List Delimiter
The 'GS' parameter is used to define the character to be returned between each of the filenames and directory name by the GET_FILE_BOX directive when returning multiple file names.
The value in this parameter can be initialized by defining GetFileDelim=nnn in the [Config] section of your INI file.
(The 'GS' system parameter was added in PxPlus v8.01, build 9181.)
Default setting is 9 (TAB) unless overridden in the INI file.
GET_FILE_BOX Ask for Filename