Have you looked through the VISA help for information about Events that handle interrupts? When you have a PCI board that you are creating a VISA driver for, you should be looking at the PXI Instr class. I think if you start your search at VI_EVENT_PXI_INTR, you should be headed in the right direction. Unfortunately I do not currently have an example of an interrupt handler in LabVIEW.
Logan S.
Message Edited by LoganS on 11-04-2005 04:57 PM