SUB...END SUB            Define Procedure

 SUB identifier [(parmlist)]
    [LOCAL varlist]
    [STATIC varlist]
    [SHARED varlist]
    .
    . [statements]
    .
    [EXIT SUB]
 END SUB

    Defines a procedure (subprogram).

  identifier    A name for the procedure; must be unique and must follow
                conventions for naming labels and variables.

    parmlist    A comma-delimited list of formal parameters to be passed
                when the procedure is CALLed. The parameter's names serve
                only to define the procedure; they have no relationship to
                like-named variables elsewhere in the program.

     varlist    A comma-delimited list of variables declared LOCAL,
                STATIC, or SHARED.

    EXIT SUB    An optional early exit point from the procedure. Does not
                terminate the procedure definition (END SUB is still
                required).

   --------------------------------------------------------------------------

      Notes:    Procedures may be defined anywhere in a source program.
                Execution flow does not need to be directed through (or
                around) the procedure definition.

                Do not jump into or out of a procedure definition with
                GOTO, GOSUB, or RETURN.

                Array names in parmlist should be followed by a number in
                parentheses, specifying the number of dimensions in the
                array.

                Procedure variables are SHARED (global) by default.
                Borland recommends that you declare SHARED variables
                explicitly, however, in case the default is changed in
                future versions of Turbo Basic.

                See "SUB..INLINE" for defining assembly language
                procedures.