  PROTO

  【1.0 build 10 追加】
   PROTO <function name>[,<function name> ][, ...] [ALIAS <word>]

   Type: statement

   Defines an external function so it is accepted by the BaCon parser.
   Mutliple function names may be mentioned but these should be separated
   by a comma. Optionally, PROTO accepts an alias which can be used instead
   of the original function name. During compilation the BaCon program must
   explicitly be linked with an external library to resolve the function
   name. Examples:

   PROTO glClear, glClearColor, glEnable
   PROTO "glutSolidTeapot" ALIAS "TeaPot"

