Remarks 

The $V directive is meaningful only for Delphi code that uses short strings, and is provided for backwards compatibility with early versions of Delphi and CodeGear Pascal. 

The $V directive controls type checking on short strings passed as variable parameters. In the {$V+} state, strict type checking is performed, requiring the formal and actual parameters to be of identical string types. In the {$V-} (relaxed) state, any short string type variable is allowed as an actual parameter, even if the declared maximum length is not the same as that of the formal parameter.