DOCBOOK-APPS: Including C source code in a document

Hi!

I am trying to include directly C source code into a DocBook document,
but I'm having some problems with C elements. They are being parsed as
SGML elements (such as <stdio.h> and & and other...). Is there any way
to deactivate the parsing on a programlisting? 

Thanks,
-- 
Godoy. <>

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