Hello testdev.
The niSwitch Initialize VI can be found in the NI-SWITCH functions palette which is under the Measurement I/O palette heading on the functions palette. The VI's that control a single switch are the niSwitch Connect Channels VI and the niSwitch Disconnect Channels VI which are also located on the first level of the NI-SWITCH functions palette.
Please keep in mind that you must install the NI-SWITCH driver to see these VI's. This driver can be downloaded for free at:
NI-Switch Version 3.4 for Real-Time OS/Windows 2000/XP
Let us know if you have any other questions on this issue. We will be happy to help.
Brian F
Applications Engineer
National Instruments