Implementation of unsigned int in gobject

["David Shultz" <mrbraz97 gmail com>]

I really like to learn the inner workings of gtk+.
So I want to know where exactly in the source
code guint defined as unsigned int. I tried
grep -re "unsigned int" * at gobject directory but
couldn't find anything. I then searched with google
but no luck. I really want to be gtk+ expert. Please
help me find the answer. Atleast just point me to
a direction where i can learn more about it? Thanks.