[Osiris]

It is possible to set the Windows Taskbar to autohide if the mouse is not in the area. It will automatically appear again if you move the mouse in the area of the taskbar. A user on the Donation Coder forum asked if there was a way to prevent this from happening and if it would be possible to display the Windows taskbar only when a key, the Windows key, would be pressed.
Guess what. Ten hours after making the request Skrommel posted a reply in that thread with a link to a software that he had created that would do exactly what the thread starter wanted it to do. To be more precise Skrommel posted the Autohotkey code that could be used to make the Taskbar behave this way.
To sum it up again. This little piece of code automatically hides the Windows Taskbar and prevents it from showing up when the mouse is moved in the area of it. The taskbar is only shown when the user presses the Windows key on his keyboard and hidden again when the key is released.
If you have not checked it out yet I suggest you do so. The Donation Coder forum is a excellent place to learn about new applications and ask for software advise. As you can see if it does not exist it could be that it will be created just for you.

Display Windows Taskbar only when key is pressed