JSON string.

Name of data file, view or query used.

List of names of items to export. The names are delimited by single quotes and they are separated by commas or CR characters. The names of composite key items, binary items and binary memo items are ignored.
If this parameter is an empty string (""), all of the data file items are exported (except composite key, binary, binary memo, and password items).

Specifies the creation mode of JSON file:

hExpBreakable	The export can be interrupted by pressing Esc. If the export is interrupted, the JSON string is valid and contains only the records exported before the interruption.
hExpNormal (default value)	Standard operating mode.

Name of the Progress Bar control or window that displays the progress of the JSON string creation.