Hi
I recommend you to start with the "Event structure" examples in LV. =>Find Examples=>search for "event structure". You will see four examples which can give you an introduction. See into the LV help too.
Check this link too:
http://zone.ni.com/devzone/devzone.nsf/webcategories/95A3C6B1A5A3A96386256B35005D3914?opendocument
Regards,
Luca