I have created a custom popup user control. This control covers the entire application with a gray semi-transparent overlay with a message in the middle.
I add the control like this which makes it the last control in the grid and putting it on top of all other objects.
Grid mainGrid = (Grid)App.Current.MainWindow.Content;
I have a docking control in this grid and as long as everything is docked the overlay works great. However, as soon as I pull one of the RadPanes into a separate ToolWindow that tool window is always on top of my overlay user control. Is there anyway to do an overlay that would be on top of the ToolWindow as well?