byte[] wideBytes = str.getBytes(StandardCharsets.UTF_16LE);
            int charCount = str.length();

            // NDR string structure: MaximumCount, Offset, ActualCount, then data
            buf.enc_ndr_long(charCount + 1); // MaximumCount (including null terminator)
            buf.enc_ndr_long(0); // Offset
            buf.enc_ndr_long(charCount + 1); // ActualCount (including null terminator)