Re: GNU Emacs 22.0.99.1 (i386-mingw-nt5.1.2600) of 2007-04-24: cua-mode interfers with comment-region

[Robert J. Chassell]

      emacs -Q foo.cpp&
      type, for example, #include, select it with the mouse then issue 
      comment-region with C-c C-c, the selection is instantly commented out

Yes.  `comment-region' sees the region that you selected, as it
should, and when you invoke it, comments that region out.

(emacs)CUA Bindings says

    The command `M-x cua-mode' sets up key bindings that are
    compatible with the Common User Access (CUA) system used in many
    other applications.  `C-x' means cut (kill), `C-c' copy, `C-v'
    paste (yank), and `C-z' undo.  Standard Emacs commands like `C-x
    C-c' still work, because `C-x' and `C-c' only take effect when the
    mark is active (and the region is highlighted). ...

Following your instructions, the mark is active, so C-c should mean `copy'.
Info goes on to say

    To enter an Emacs command like `C-x C-f' while the mark is active,
    use one of the following methods: either hold `Shift' together
    with the prefix key, e.g. `S-C-x C-f', or quickly type the prefix
    key twice, e.g. `C-x C-x C-f'.

Both `S-C-c C-c' and `C-c C-c C-c' succeed in commenting the region.

      Hello! Don't know if this is a bug or if this is supposed to
      happen ...

`comment-region' is supposed to comment a region, so this is supposed
to happen.

-- 
    Robert J. Chassell                          GnuPG Key ID: 004B4AC8
    address@hidden                         address@hidden
    http://www.rattlesnake.com                  http://www.teak.cc