XNET CVI Questions

Hello,

I have a couple of questions about using XNET in CVI.

1) Is there a way to get the time stamp of a transmitted frame without having to receive it on another CAN interface?

2) Is there a way to generate a callback when a CAN frame arrives instead of having to poll it?  There is one for Serial ports..., but I can't find anything for XNET Read Frames

Thanks,

Terry Moss