$FUNCNAME$
    FT_ISSHARE()
$CATEGORY$
    DOS/BIOS
$ONELINER$
    Determine if DOS "Share" is installed
$SYNTAX$
    FT_ISSHARE() --> nRetCode
$ARGUMENTS$
    None
$RETURNS$
    nRetcode will be set as follows on exit:

	0 if SHARE not loaded but ok to load
	1 if SHARE not loaded and not ok to load
      255 if SHARE loaded
$DESCRIPTION$
    Uses DOS interrupt 2Fh (MultiPlex interrupt), service 10h
    to determine if DOS SHARE.COM is loaded.
$EXAMPLES$
   IF FT_ISSHARE() != 255
      Qout("SHARE must be loaded!")
   ENDIF
$SEEALSO$
   FT_INT86()
$Author: itk $
   Glenn Scott (from Tom Leylan C source)
$end$

