How to cause hidden control when the mouse is near the edge of the screen

In my WPF project, the main window is a transparent window (AllowsTransparency = "True" and Background = "Transparent"). WindowState Maximized. At the bottom of the window is a list. The list will be deleted after a few seconds. The requirement is to keep the list hidden until the mouse approaches the bottom of the screen.

How can I return the list in this situation? Using the MouseMove event in the main window does not help at all, since it is a transparent window. Is there another event that I can use to detect the mouse is at the bottom of the screen? Thanks