Altering a font in textview

[Steve & Patti Getzinger <psatg bluemarble net>]

This one has ran me in circles for about a week now. Been through just 
about every .h file, books, archive, ...

style->font

structure has no member

checking struct we have a PangoTextDescription

so when I attempt style->font_desc we get past the no member portion but 
get an invalid cast when using gtk_load_font. I have been looking at 
GtkTextTag but for the life of me can not figure out how to designate my 
text as a tag as to apply attribute changes not to mention 
gtk_object_set says invalid cast when I attempt to use tag as the 
object. I am totally lost on this one. How do I change the font of text?

TIA
Steve