Chris,
I believe ibask will accomplish your task. One of the options is ibaAUTOPOLL, which will return a zero or one indicating the state of the AutoPoll. You can find more information on this function and others in the NI-488.2 Function Reference Manual. Here is a link: http://digital.ni.com/manuals.nsf/websearch/7F9CFDD677DFE7A48625672B006C4ADB?OpenDocument&node=132100_US
Heather S.
Applications Engineer
National Instruments