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(buffer-insert-with-style) help

Hi to all...

I'm trying to learn MCL 2.0, and I could use some help with a
function.  I'm trying to write to a fred window in different fonts at
different times.  I'd like to do this with (buffer-insert-with-style),
but I can't figure out how to call it.  It needs a style as the final
argument, which is a simple-array of type signed-byte 16.

OK, now to figure out what the contents of this array should be.  So,
let's call (font-codes) on the font I want to use.  (font-codes
'("geneva" 0 :bold)) returns 4 values: 196864 65536 -65280 65535.
Great -- but all of those numbers are too large to fit into a
signed-byte 16 (which can only take numbers up to 2^15-1 = 32767,

What am I doing wrong?  I can accomplish what I need by changing the
font of the insertion point, writing the string, and then changing it
back, but I don't want to admit defeat :-).

Thanks for your time, and replies will be appreciated greatly.

Doug Merrill
Cognitive Science Lab
Princeton University