Gtkmm, Gtk, and Xlib compiling error - Please help

["Rose Cumming" <rose_alice_cumming hotmail com>]

Hello,

When I add this line

#include <X11/Xlib.h>

in a Gtk application. For example, in base.c in the Gtk examples, it 
compiles and works.

If I do the same in a Gtkmm application, such as wheelbarrow.cc in the Gtkmm 
examples, I get a compiling error as followed:
Can I not use Xlib functions in a Gtkmm application?

---------------------------------------------------------------------------------------------------------------------------------

In file included from /usr/local/include/gtkmm-2.0/glibmm/interface.h:24,
                from /usr/local/include/gtkmm-2.0/glibmm.h:37,
                from /usr/local/include/gtkmm-2.0/gdkmm/types.h:6,
                from /usr/local/include/gtkmm-2.0/gdkmm.h:27,
                from wheelbarrow.cc:8:
/usr/local/include/gtkmm-2.0/glibmm/object.h:114: parse error before numeric
  constant
/usr/local/include/gtkmm-2.0/glibmm/object.h:115: type specifier omitted for
  parameter
/usr/local/include/gtkmm-2.0/glibmm/object.h:115: parse error before numeric
  constant
In file included from /usr/local/include/gtkmm-2.0/gdkmm.h:27,
                from wheelbarrow.cc:8:
/usr/local/include/gtkmm-2.0/gdkmm/types.h:188: parse error before `int'
/usr/local/include/gtkmm-2.0/gdkmm/types.h:205: parse error before `int'
/usr/local/include/gtkmm-2.0/gdkmm/types.h:211: parse error before `}' token

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