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  Argument
 
    source     String expression
 
  Returns
 
    Integer    Number of characters currently in the string
 
  Description
 
    The Length function returns the dynamic length of a string. The
    dynamic length is the current number of characters within the
    declared length of a string. The declared length is the maximum
    number of characters a string will store. It is specified when the
    string is defined.
 
    Length can operate on the result of a string expression, as in
 
       result := Length( Copy( source, 3, 4 ) );
 
    Use Delete to change the length of a string.
 
    Length does not return the declared length of a string. To get the
    maximum length that a string variable may hold,
 
       result := SizeOf( source ) - 1;