Gtksourceview color schemes help.

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http://forums.fedoraforum.org – I've been wanting to make my own syntax-highlighting scheme for GTK source view, mainly to use in Anjuta/GEdit, but I have no experience with xml. I've tried making one with the Scribe Theme Generator, but the highlighting options are just too limited for me. I'm already trying to get the hang of xml and making a color scheme from scratch, but I still feel unsure. Can anyone point me to a guide or tutorial for making a gtksourceview color scheme, particularly one that works well with languages like C++, Java, and C#? (HowTos)