Syntax:        TXSUB(<expC>)

     Purpose:       Prints a text string in subscript mode.

     Argument:      <expC> is the text string or character memory
                    variable to be printed in subscript.

     Returns:       Subscripted string

     Usage:         TXSUB() is useful anytime you need to print your
                    text subscripted. It will print the subscripted
                    text in the same font as your normal text line.

     Example:       water   = "H"+txsub("2")+"O"
                    badacid = "H"+txsub("2")+"SO"+txsub("4")
                    @ 10, 10 say "Drink "+water+" not "+badacid

     See Also:      TXSUPER(), TXCOLPRINT(), TXDOTPRINT()