1 First steps In detail, all this translates into the following: • Your keyboard is owned by the VM if the VM window on your host desktop has the key- board focus (and then, if you have many windows open in your guest operating system as well, the window that has the focus in your VM). This means that if you want to type within your VM, click on the title bar of your VM window first. To release keyboard ownership, press the Host key (as explained above, typically the right Control key). Note that while the VM owns the keyboard, some key sequences (like Alt-Tab for example) will no longer be seen by the host, but will go to the guest instead. After you press the host key to re-enable the host keyboard, all key presses will go through the host again, so that sequences like Alt-Tab will no longer reach the guest. • Your mouse is owned by the VM only after you have clicked in the VM window. The host mouse pointer will disappear, and your mouse will drive the guest’s pointer instead of your normal mouse pointer. Note that mouse ownership is independent of that of the keyboard: even after you have clicked on a titlebar to be able to type into the VM window, your mouse is not necessarily owned by the VM yet. To release ownership of your mouse by the VM, also press the Host key. As this behavior can be inconvenient, VirtualBox provides a set of tools and device drivers for guest systems called the “VirtualBox Guest Additions” which make VM keyboard and mouse operation a lot more seamless. Most importantly, the Additions will get rid of the second “guest” mouse pointer and make your host mouse pointer work directly in the guest. This will be described later in chapter 4, Guest Additions, page 53. 1.8.3 Typing special characters Operating systems expect certain key combinations to initiate certain procedures. Some of these key combinations may be difficult to enter into a virtual machine, as there are three candidates as to who receives keyboard input: the host operating system, VirtualBox, or the guest operating system. Who of these three receives keypresses depends on a number of factors, including the key itself. • Host operating systems reserve certain key combinations for themselves. For example, it is impossible to enter the Ctrl+Alt+Delete combination if you want to reboot the guest operating system in your virtual machine, because this key combination is usually hard- wired into the host OS (both Windows and Linux intercept this), and pressing this key combination will therefore reboot your host. 20