Hi,
You may get the help to every VI by several ways:
1. Place VI on the diagram. Select it using positioning tool and press down Ctrl-H. The Context Help window will appear.
2. Place VI on the diagram. Right click on it and select Help option from pop-up menu. The help file will be opened.
3. Go to menu "Help->Contents and Index"
4. And the last - try to READ MANUAL.
Good luck.
Oleg Chutko.