Name space clash: gdi.h and ncurses both use DC...

Here are a couple of name space problems, which I would
    give at least a P4 priority. - They are straight forward
    to fix, but absolutely painful, if left as they are.

1)	There is a very nasty name space clash in wine (CVS, today,
    2002-09-29).
    Both gdi.h and ncurses use the name DC, but obviously for two
    different purposes.
    This might not happen with all versions of ncurses, but at
    least on one of my FreeBSD boxes it happens. OTOH there is no
    guarantee that on some systems the files named ncurses.* are
    not simply symlinks to some other implementation of curses.

So, using any of the short names used by (n)curses for any
    other purposes is a very bad habit in general, and one which
    should be avoided at all cost in programs which also use any
    version of curses.
    The curses' unlucky naming policy has been the curse upon us
    all for ages already. It would be all too hard to change any
    of that now. It is far better to simply try to do better in
    one's own selection of names.

I propose changing the DC (Display Context ?) to something
    more verbose. If it is strictly windows related, might WinDC
    or Win_DC do just fine?

2)	Apparently wine also defines the name IN to empty somewhere
    in the header files. This raises a syntax error in curses.h,
    because a symbol in a list gets deleted leaving only a comma.
    So, the compiler finds something like

extern char     AM, BS, CA, DA, EO, HC,  , MI, MS, NC, NS, OS,
                PC, UL, XB, XN, XT, XS, XX;

Obvious enough, the compiler complains. The same logic as
    above still applies. Hands off the short names, which could
    collide with curses.

I hope this helps.

Cheers,
    	// jau
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  /    Jukka A. Ukkonen,                            Mawit Ltd, Finland
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