The OpenWatcom C/C++ User's Guide actually has a sectiom named
"Double-Byte/Unicode Characters", although it's not in the index (for
the HTMLHelp version anyway). I found it by finding "exception" in the
index, selecting "C++ Exception Handling", and pressing "Next" enough
times. This can also be found from the Menu, under compiler options
and the the "full description" part.
The compiler options listed are
zk{0,1,2,l}
zk0u
zku=<codepage>
perhaps one or another of them would help.
--
"I begin to envy Petronius."
"I have envied him long since."