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 The BYVAL attribute in the parameter list portion of a DECLARE, SUB, or
 FUNCTION statement (or the argument list of a CALL[S] statement) to indicate
 the argument is passed by value rather than by reference (default). BYVAL
 cannot be used with a variable of a user-defined type.
 
    BYVAL variable [AS type]
 
    ■ variable   Name of the variable to pass as an argument; for array
                 variables, use the parentheses but omit the number of
                 dimensions
 
    ■ type       Data type of the argument variable: INTEGER, LONG, SINGLE,
                 DOUBLE, CURRENCY, or STRING
 
 See Also
    ◄CALL Statement (Basic Procedures)►
    ◄DECLARE Statement (Basic Procedures)►
    ◄FUNCTION Statement►
    ◄SUB Statement►