I don't think that it will be possible to get any text information from a CVI application using the AutoIt application. The reason that it can read text from some windows programs, such as Notepad, is because Notepad uses windows controls, and exposes some of these inner features to the windows environment. The problem is that CVI does not use these windows controls, and does not expose these values to be read with windows SDK functions, which is why you can't see anything with AutoIt. You can press the button from AutoIt, however, you just need to use the send command to send the correct key press. For example, if your button is called
Go, you could use the script send("{!g}"), which would be the same as pressing Alt+g in the window. I hope this helps a little bit!
Nick Beer
National Instruments
Applications Engineering