Exact specification of widget placement

[Yoav Cohen-Sivan <yoavcs netvision net il>]

I've just started studying GUI programming in my rare free time and I
was given a pointer to gtk as a good beginning. I've glazed over the
docs and I seem to be missing something; is there a way for me to
specify the exact position of a child widget in a parent? Can I say:
"put this child at coordinate 12,45 relative to it's parent"? If so,
how; and if not, then how do I go about placing widgets inside their
parents.

	Apologies if this is a *really* stupid question, but, hey, I'm sure
even Linus started from nothing sometime in the past ;-)

	Yoav