Reference Paths Dialog Box (Visual Basic)
The Reference Paths dialog box allows you to set paths for assembly references used by the project.
To access this dialog box, on the References page of the Project Designer, click the Reference Paths button.
When the project system finds an assembly reference, it resolves the reference by looking in the following locations, in the following order:
The project directory. The project directory files appear in Solution Explorer when Show All Files is not in effect.
Directories specified in this dialog box.
Directories displaying files in the Add Reference Dialog Box.
The project's obj directory. (Any assemblies created as a result of adding a COM reference to your project are added to the project's obj directory.)
For more information, see How to: Set the Reference Path (C#)