Hi,
Please check out the following link for programmatically writing a 2D array to a multicolumn listbox at the desired location. You can use this example to write one/several rows at a time to the listbox.
http://sine.ni.com/apps/we/niepd_web_display.display_epd4?p_guid=B45EACE3DC9556A4E034080020E74861&p_node=DZ52041
Regards,
Ankita A.