Section 13,34: Function_Reference

 Transfers control and passes arguments to a function.  Format:

    nam (p[,p]...)

    nam  Is the name of the function or the name of an entry 
         point to the function.

    p    Is a value to be passed to the function.  The value 
         can be a constant, the name of a variable, the name 
         of an array element, the name of an array, an expression, 
         a substring, field reference, or the name of a subprogram 
         or entry point to a subprogram (must be defined as 
         external).  You must not specify more than 255 arguments.