Window titlebar/caption background color

[DavidInvenio]

I've been searching and testing most of the night, time to ask for help!
I need to change my style, which I began with a copy of the default aero, so that the background color of the titlebar/caption is correct. Until I found WSB I was changing that property manually here:
Control Panel\All Control Panel Items\Personalization\Window Color and Appearance
But I have yet to find the right place in the .msstyles tree!
I started under DWM Window, but also Colors & Fonts above that.  Still no results.

Thanks in advance for any hints!

PS: I was thrilled when I did manage to kill that darn glowing effect of the caption text!  What a horrible idea!

[3am]

Like I said: edit or replace the frame images