WPF Always On Top

c# wpf topmost
Kuba Wasilczyk picture Kuba Wasilczyk · Nov 18, 2013 · Viewed 72.6k times · Source

Is it possible to make a window stay always on top even when other application is running on Fullscreen? I'm using right now TopMost = true but when other application is running on fullscreen mine becomes invisible. It's WindowStyle = None window by the way.

Edit: And do not let other window minimalize ofcourse

Answer

Sheridan picture Sheridan · Nov 18, 2013

This won't work 100% of the time, but it will improve the situation somewhat. You can set Topmost = true in the handler for the Window.Deactivated event:

private void Window_Deactivated(object sender, EventArgs e)
{
    Window window = (Window)sender;
    window.Topmost = true;
}

The Deactivated event will be called whenever your application loses focus (often when another application requests to be Topmost) and so this will reset your application on top after this.

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