Hi all. This is my changes :)
serialui - Started serialui dll - Implemented drvCommConfigDialogA and drvCommConfigDialogW
kernel32.diff - Implemented CommConfigDialogA and CommConfigDialogW - Removed @unimplemented comments for some implemented functions
include.diff - Add missing ioctls to ntddser.h: IOCTL_SERIAL_GET_COMMCONFIG and IOCTL_SERIAL_SET_COMMCONFIG
btw. Screenshot is here: http://www.ljplus.ru/img2/drg4njubas/commdlg.JPG