You won't be able to add that extra button on the far right of a per-pixel titlebar. Only the standard 3 and the default system icon are supported. You're going to run into trouble with hard coded black text on many dialogs if you keep that dialog background color. Also, WindowBlinds can't group together the toolbar icons like that, and Windows can't do oval combo boxes like that.
Some things to think about before you get too far.
