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$V: Var-String Checking Switch
Controls type-checking on strings passed as variable parameters.
Syntax: {$V+} or {$V-}
Default: {$V+}
Type: Local
Menu Command: Options|Compiler|Strict Var-String
The $V+ State
In the $V+ state, strict type-checking is performed, requiring the formal and actual parameters to be of identical string types.
The $V- State
In the $V- state, any 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. Although $V- is still supported, you should use the open string parameters.