Russ,
Hi, I have. However, the call to Shell_NotifyIcon() requires a somewhat complex data structure to be created before the icon can be drawn. That structure holds callback space and other reporting schemes that the function will need to report to when "stuff" happens in the taskbar (e.g. A mouse click on the boundary of the icon).
It's not impossible to write a CIN that will load some icons and you could select (numerically from within LabVIEW) which icon to draw in the bar..but I think (considering the complexity of the data structures involved) you will have to implement this inside a CIN.
Kindest,
Warren