VERDICT
You might be interested in using a virtual machine for development, in which case you may want it to be isolated from the host. Alternatively, you could well need to transfer files or information between host and guest. With VirtualBox you first need to install the Guest Additions inside the VM, which in turn means you need a compiler suite installed on the VM and a kernel built with the necessary options, so this may be a simple task or a more complex one. After that it’s simply a matter of enabling the shared clipboard in the settings to be able to copy on one side and paste on the other. Similarly, you can enable drag and drop to copy whole files.