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c#winformsfullscreen

Full screen c# windows form covering all monitor

Is there a way to make make a windows form application full screen and black out your secondary monitors? So the main display is on your primary display and all your other monitors are just completely black?

Solution

  • You can use the Screen class which give you informations about the current active screens.

    // Form myFrm
Rectangle r = new Rectangle();
foreach (Screen s in Screen.AllScreens)
{
   if ( s != Screen.CurrentScreen ) // Blackout only the secondary screens
         r = Rectangle.Union(r, s.Bounds);
}
myFrm.Top = r.Top;
myFrm.Left = r.Left;
myFrm.Width = r.Width;
myFrm.Height = r.Height;
myFrm.TopMost = true; // This will bring your window in front of all other windows including the taskbar