How to increase the /var (UFS) filesystem and root disk under veritas control?

I need to increase the /var (UFS) filesystem and root disk under veritas control or root disk is encapsulated

# df -k /var
Filesystem            kbytes    used   avail capacity  Mounted on
/dev/vx/dsk/var      13241195 12475897 674524    96%    /var

# fstyp /dev/vx/dsk/var
ufs
# pkginfo -l VRTSvxvm
   PKGINST:  VRTSvxvm
      NAME:  VERITAS Volume Manager, Binaries
  CATEGORY:  system
      ARCH:  sparc
   VERSION:  3.5,REV=06.21.2002.23.14
   BASEDIR:  /
    VENDOR:  VERITAS Software
      DESC:  Virtual Disk Subsystem
    PSTAMP:  VERITAS-3.5s:21-Jun-2002
  INSTDATE:  Jul 13 2005 16:01
   HOTLINE:  800-342-0652
     EMAIL:  support@veritas.com
    STATUS:  completely installed
     FILES:      599 installed pathnames
                  24 shared pathnames
                   9 linked files
                  76 directories
                 336 executables
              158828 blocks used (approx)

# vxassist -g rootdg maxgrow var
Volume var can be extended by 124742928 to: 166315264 (83123Mb+1280 sectors)
# vxdg -g rootdg free
DISK         DEVICE       TAG          OFFSET    LENGTH    FLAGS
rootdisk     c1t0d0s2     c1t0d0       0         61055     -
rootdisk     c1t0d0s2     c1t0d0       161983467 124634705 -

Please let me know the right process as I know vxresize command and done increasing the vxfs filesystem many times but I think for increasing the ufs filesystem in veritas control has some different process.

After the disk volume has grown use growfs.