bringToTop brings the specified screen device's window to the
  front of the window stack (and gives it focus).  With first argument
  -1 it brings the console to the top.  If stay =  TRUE, the window is designated as a topmost window,
  i.e.\ifelse{latex}{\out{~}}{ } it will stay on top of any regular window.  stay may only be used
  when Rgui is run in SDI mode.  This corresponds to the Stay on top
  popup menu item in Rgui.
bringToTop(which = dev.cur(), stay = FALSE)-1.msgWindow, windows