Как конвертировать WideString в String?

{:Converts Unicode string to Ansi string using specified code page. 
  @param   ws       Unicode string. 
  @param   codePage Code page to be used in conversion. 
  @returns Converted ansi string. 
} 
 
function WideStringToString(const ws: WideString; codePage: Word): AnsiString; 
var 
  l: integer; 
begin 
  if ws = ' then 
    Result := ' 
  else  
  begin 
    l := WideCharToMultiByte(codePage, 
      WC_COMPOSITECHECK or WC_DISCARDNS or WC_SEPCHARS or WC_DEFAULTCHAR, 
      @ws[1], - 1, nil, 0, nil, nil); 
    SetLength(Result, l - 1); 
    if l > 1 then 
      WideCharToMultiByte(codePage, 
        WC_COMPOSITECHECK or WC_DISCARDNS or WC_SEPCHARS or WC_DEFAULTCHAR, 
        @ws[1], - 1, @Result[1], l - 1, nil, nil); 
  end; 
end; { WideStringToString } 
 
 
{:Converts Ansi string to Unicode string using specified code page. 
  @param   s        Ansi string. 
  @param   codePage Code page to be used in conversion. 
  @returns Converted wide string. 
} 
function StringToWideString(const s: AnsiString; codePage: Word): WideString; 
var 
  l: integer; 
begin 
  if s = ' then 
    Result := ' 
  else  
  begin 
    l := MultiByteToWideChar(codePage, MB_PRECOMPOSED, PChar(@s[1]), - 1, nil, 0); 
    SetLength(Result, l - 1); 
    if l > 1 then 
      MultiByteToWideChar(CodePage, MB_PRECOMPOSED, PChar(@s[1]), 
        - 1, PWideChar(@Result[1]), l - 1); 
  end; 
end; { StringToWideString } 

Взято с сайта https://www.swissdelphicenter.ch/en/tipsindex.php