Instead of using a LV function use a subvi that will stay open for a set amount of time. You can change the properties of the vi to look like a dialog using the vi properties menu. So you can use a listbox, string control, whatever. Set the subvi to open when called and close afterwards. Hope this helps.
BJD1613
Lead Test Tools Development Engineer
Philips Respironics
Certified LV Architect / Instructor