TCharHelper.ConvertToUtf32

public class function TCharHelper.ConvertToUtf32(

  const S: UnicodeString;

  Index: Integer

):UCS4Char; overload;

class function TCharHelper.ConvertToUtf32(

  const S: UnicodeString;

  Index: Integer;

  out CharLength: Integer

):UCS4Char; overload;

class function TCharHelper.ConvertToUtf32(

  const HighSurrogate: UnicodeChar;

  const LowSurrogate: UnicodeChar

):UCS4Char; overload;