top bit hof vnd fix

        uint vnd = 0;
            uint date = 0;
            vnd |= (Convert.ToUInt32(TB_VN.Text) & 0xFF);
            date |= (uint)((CAL_MetDate.Value.Year-2000) & 0xFF);
            date |= (uint)((CAL_MetDate.Value.Month & 0xF) << 8);
            date |= (uint)((CAL_MetDate.Value.Day & 0x1F) << 12);
            vnd |= ((date & 0x1FFFF) << 14);
            //Fix for top bit
            uint rawvnd = BitConverter.ToUInt32(data, offset + 0x1B0);
            vnd |= (rawvnd & 0x80000000);
            Array.Copy(BitConverter.GetBytes(vnd), 0, data, offset + 0x1B0, 4);