Syntax:        TXMACCALL(<expN1>)

     Purpose:       Function to call a macro for execution. When a
                    macro is called, it begins executing the commands
                    using the current modified print environment.
                    Changes made to settings during a macro call are
                    recorded in the modified print environment, but
                    are not retained upon completion of the macro
                    call. The modified print environment that existed
                    prior to the macro call is restored.

     Argument:      <expC> is the ID # of the macro.

     Returns:        0  Successful

     Usage:         TXMACCALL() is used to perform the macro.

     Example:       TXMACCALL(1)

     See Also:      TXMACBEGIN(), TXMACEND(), TXMACDEL(), TXOVERLAY(),
                    TXMACEXEC()