Like Parallels Desktop and VMware Fusion, VirtualBox provides an environment in which Windows works just as it should—for the most part. A few tasks, however, may require some extra explanation.
If you have a mouse or trackball with two or more buttons, the right button should work as a right click (producing a contextual menu) within Windows, as you'd expect. If you have a one-button Apple mouse, you can simulate a right click by holding down Control while clicking. If you're using a MacBook or MacBook Pro, you can perform a right click using the trackpad, as long as it's configured properly. (Read Right-Clicking, p. 7, for complete details.)