>>Returns question mark.
>>Result should be Ü character, single byte 0xDC. Those 4 bytes per character are returned in WinHttpRequest.ResponseText. How to get 0xDC result ?
>
>Possibly the result you are getting is double width text, so you may need to do strconv() twice - first utf8 to double width, then that to 1257, I think the parameter is 2. I think I had cases when I had to do that (in my case, to 1250).

Strconv() Parameter 2 does not accept code page. It requires locale id. Baltic locale id is not documented.

Tried

FOR i=1 TO 99999
  cres='?'
  ON ERROR note
  cres = STRCONV( strconv(CHR(0xc3)+CHR(0x83)+ CHR(0xc2)+CHR(0x9c) ,11) ,2,i)
  ON ERROR

IF cres#'?'
  ? i, cres
  ENDIF

ENDFOR

This does not return any value.
How to use your suggestion?