StrBetweenCharU

function StrBetweenCharU(

  const S: UnicodeString;

  const FirstDelim: WideChar;

  const SecondDelim: WideChar;

  const FirstOptional: Boolean = False;

  const SecondOptional: Boolean = False

):UnicodeString; overload;

function StrBetweenCharU(

  const S: UnicodeString;

  const FirstDelim: ByteCharSet;

  const SecondDelim: ByteCharSet;

  const FirstOptional: Boolean = False;

  const SecondOptional: Boolean = False

):UnicodeString; overload;