See
How to use ArcGIS samples for help on running the sample.
If the sample has associated data, you will find that the sample's zip file includes a "data" folder alongside the language folders.
However, you will need to update the sample to point to the location of the data once you have extracted all the files.
Run the UseOverviewControl application.
Click the Load button to browse your file system for a map document to load into the PageLayout control.
Press the left mouse button to zoom in, and the right mouse button to pan the main PageLayout control.
View the visible extent on the other PageLayout control.