Syntax highlighting on macro definitions

[Manolo]

Hello

Preprocessor commands coloring, when i.e. a macro
definition needs several \-continued lines, has two behaviors:
a) All lines that are part of the macro have fully same color, say
green on white.
b) If a comment line is part of the macro, coloring is restored
to normal C++ syntax highlighting.

I don't know which behavior is desired. I think I can live with
anyone of them, but just one.

Perhaps \-continued lines should have a different background...

Manolo