You see the ghost window, a window created by the Windows window manager to replace a dead window. You see "Do Not Respond" in the title bar. Of course, this window will not have the same style, but Windows does not know how to do this.
You can use the Spy ++ utility to view the window properties of another application. VS2012 really uses the usual window style with a title bar. How they are set up is a well-kept secret, I suspect that they intercept WM_NCPAINT, a rather complicated message to realize themselves. Using a borderless window is definitely easier.
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