144: How do I bind a combination of modifier key and function key?
  
  Unless you're using Emacs under emacstool (or xvetool?) or you have a
  working version of x-rebind-key (see question 130), you
  can't do this with Emacs alone.
  
  If you are using emacstool, Emacs sees different character sequences for   !
  the combination of a modifier and a function key from what it sees for the
  function key alone.  See etc/emacstool.1 for more information.  Since
  Emacs sees different character sequences, you can bind these different
  sequences to different commands.
  
  If you are running Emacs inside a terminal emulator window like xterm, you
  can modify its translation tables to make it generate different character
  sequences for the combination of a modifier and a function key.  For
  example, this X resource setting:
  
    XTerm.VT100.Translations: #override \
      Shift<KeyPress>F1: string(0x1b) string("[xyzzy")
  
  makes Shift-F1 generate the character sequence "ESC [ xyzzy".  You can
  bind these character sequences in Emacs as normal.  Nick Ruprecht          +
  <ruprecht@informatik.uni-freiburg.de> has written an extensive X           +
  translation mapping for xterm that does this.  {Does this have an FTP      +
  site?}                                                                     +