You should probably have started a new thread instead of posting to one that's 3 years old but in any case, go to the help menu and select Find Examples. When the example finder is open, click the search tab. Enter oscilloscope as the keyword. Double click the keyword in the box below. You should see lot of examples. If you have a regular DAQ board and not an NI-Scope card, look at the examples called 1 Channel Simple Scope and 2 Channel Oscilloscope.
Searching the examples is a pretty basic function. It seems you're brand new to LabVIEW. You should take a class or tutorial. You can find information at the
LabVIEW Learning Center.