private function _readStyle()
	{
		$length = self::_GetInt2d($this->_data, $this->_pos + 2);
		$recordData = substr($this->_data, $this->_pos + 4, $length);

		// move stream pointer to next record
		$this->_pos += 4 + $length;

		if (!$this->_readDataOnly) {
			// offset: 0; size: 2; index to XF record and flag for built-in style
			$ixfe = self::_GetInt2d($recordData, 0);

			// bit: 11-0; mask 0x0FFF; index to XF record
			$xfIndex = (0x0FFF & $ixfe) >> 0;

			// bit: 15; mask 0x8000; 0 = user-defined style, 1 = built-in style
			$isBuiltIn = (bool) ((0x8000 & $ixfe) >> 15);

			if ($isBuiltIn) {
				// offset: 2; size: 1; identifier for built-in style
				$builtInId = ord($recordData{2});

				switch ($builtInId) {
				case 0x00:
					// currently, we are not using this for anything
					break;

				default:
					break;
				}

			} else {
				// user-defined; not supported by PHPExcel
			}
		}
	}