Well, a pop up menu is not like a tool bar, but you can find one example
here.
In general, if you want the menu to open more screens, you will need to create and call those as subVIs.
If this still doesn't help you, I suggest you explain your problem in more detail, and maybe post a screenshot of the what you want to get (no BMPs, please).
To learn more about LabVIEW, I suggest you try searching this site and google for LabVIEW tutorials.
Here and
here are a couple you can start with. You can also contact your local NI office and join one of their courses.
In addition, I suggest you read
the LabVIEW style guide and the LabVIEW user manual (Help>>Search the LabVIEW Bookshelf).
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