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I tried to run the demo program delaunay_traingulation_2.c


but it is showing the following error

delaunay_triangulation_2.C
g:\QT\qt-embedded-free-3.0.1\include\qwindowdefs.h(129) : fatal error C1083: 
Cannot open include file: 'qwindowdefs_win.h': No such file or directory
Project : warning PRJ0018 : The following environment variables were not 
found:
$(QTDIR)

Build log was saved at 
"file://g:\Cgal\Cgal-3.2.1\Cgal-3.2.1\demo\Triangulation_2\Debug\BuildLog.htm"
delaunay_triangulation_2 - 1 error(s), 0 warning(s)


---------------------- Done ----------------------

    Build: 0 succeeded, 1 failed, 0 skipped


ANY SUGGESTIONS