Itβs easy to get rid of the keyboard / menu bar below: just remove the MainMenu element from each of your forms.
Eliminating the initial menu (aka task bar) at the top of the screen is more complicated and requires the use of the Windows API. This link shows how to do this.
There is an easier way to make your application fullscreen (sorry, this is early and I donβt remember it right now), but a simpler method has an ugly side effect when the taskbar instantly appears when you switch to another form in your application, what type kills the desired kiosk effect. Using the API as described above to hide the taskbar prevents this.
However, there is a danger for this approach: if your application crashes or is reset without hiding the taskbar, your user will not be able to display it, and it will remain invisible until the device is reset.
source share