VirtualBox Seamless mode

Virtual Box Provies an exciting feature called the seamless mode.In this mode the guest and the host operating systems work symultaniously with applications being opend in such a way that it looks like a single OS.The taskbar of the guest is displayed above that of the host.In this image,windows is the guest and OpenSuse 11.1 is the host and the filemanegers and control pannels of both the OS are open symultaniously.

Note: Guest additions are required for seamless mode

For More please read:

VBox Tutorial part I: Setup and installation

V Box tutorial part II: Guest Additions