Perhaps you are using this:
http://sourceforge.net/projects/avimanager/[
^].
But you cannot use it without using it. Include it in your solution, add a reference, look for a fully-qualified name of the type (with a namespace).
If you are not familiar with either of these concepts, you are not ready for development of advanced applications; first learn about solutions, projects and assemblies and on how one assembly can use another one. You will save a lot of time if you learn it an a very simple example first, before doing anything more advanced.
—SA