{: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 }