diff --git a/Examples/12cellProtection.php b/Examples/12cellProtection.php
new file mode 100644
index 0000000..caa3876
--- /dev/null
+++ b/Examples/12cellProtection.php
@@ -0,0 +1,107 @@
+<?php
+/**
+ * PHPExcel
+ *
+ * Copyright (C) 2006 - 2012 PHPExcel
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * @category   PHPExcel
+ * @package    PHPExcel
+ * @copyright  Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
+ * @version    ##VERSION##, ##DATE##
+ */
+
+/** Error reporting */
+error_reporting(E_ALL);
+ini_set('display_errors', TRUE);
+ini_set('display_startup_errors', TRUE);
+
+define('EOL',(PHP_SAPI == 'cli') ? PHP_EOL : '<br />');
+
+date_default_timezone_set('Europe/London');
+
+/** Include PHPExcel */
+require_once '../Classes/PHPExcel.php';
+
+
+// Create new PHPExcel object
+echo date('H:i:s') , " Create new PHPExcel object" , EOL;
+$objPHPExcel = new PHPExcel();
+
+// Set document properties
+echo date('H:i:s') , " Set document properties" , EOL;
+$objPHPExcel->getProperties()->setCreator("Mark Baker")
+							 ->setLastModifiedBy("Mark Baker")
+							 ->setTitle("Office 2007 XLSX Test Document")
+							 ->setSubject("Office 2007 XLSX Test Document")
+							 ->setDescription("Test document for Office 2007 XLSX, generated using PHP classes.")
+							 ->setKeywords("office 2007 openxml php")
+							 ->setCategory("Test result file");
+
+
+// Add some data
+echo date('H:i:s') , " Add some data" , EOL;
+$objPHPExcel->setActiveSheetIndex(0);
+$objPHPExcel->getActiveSheet()->setCellValue('A1', 'Crouching');
+$objPHPExcel->getActiveSheet()->setCellValue('B1', 'Tiger');
+$objPHPExcel->getActiveSheet()->setCellValue('A2', 'Hidden');
+$objPHPExcel->getActiveSheet()->setCellValue('B2', 'Dragon');
+
+// Rename worksheet
+echo date('H:i:s') , " Rename worksheet" , EOL;
+$objPHPExcel->getActiveSheet()->setTitle('Simple');
+
+
+// Set document security
+echo date('H:i:s') , " Set cell protection" , EOL;
+
+
+// Set sheet security
+echo date('H:i:s') , " Set sheet security" , EOL;
+$objPHPExcel->getActiveSheet()->getProtection()->setSheet(true);
+$objPHPExcel->getActiveSheet()
+	->getStyle('A2:B2')
+	->getProtection()->setLocked(
+		PHPExcel_Style_Protection::PROTECTION_UNPROTECTED
+	);
+
+
+// Set active sheet index to the first sheet, so Excel opens this as the first sheet
+$objPHPExcel->setActiveSheetIndex(0);
+
+
+// Save Excel 2007 file
+echo date('H:i:s') , " Write to Excel2007 format" , EOL;
+$callStartTime = microtime(true);
+
+$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel2007');
+$objWriter->save(str_replace('.php', '.xlsx', __FILE__));
+$callEndTime = microtime(true);
+$callTime = $callEndTime - $callStartTime;
+
+echo date('H:i:s') , " File written to " , str_replace('.php', '.xlsx', pathinfo(__FILE__, PATHINFO_BASENAME)) , EOL;
+echo 'Call time to write Workbook was ' , sprintf('%.4f',$callTime) , " seconds" , EOL;
+// Echo memory usage
+echo date('H:i:s') , ' Current memory usage: ' , (memory_get_usage(true) / 1024 / 1024) , " MB" , EOL;
+
+
+// Echo memory peak usage
+echo date('H:i:s') , " Peak memory usage: " , (memory_get_peak_usage(true) / 1024 / 1024) , " MB" , EOL;
+
+// Echo done
+echo date('H:i:s') , " Done writing file" , EOL;
+echo 'File has been created in ' , getcwd() , EOL;
diff --git a/Examples/runall.php b/Examples/runall.php
index ad37f33..7e97ee8 100644
--- a/Examples/runall.php
+++ b/Examples/runall.php
@@ -52,6 +52,7 @@ $aTests = array(
 	, '10autofilter-selection-2.php'
 	, '11documentsecurity.php'
 	, '11documentsecurity-xls.php'
+	, '12cellProtection.php'
 	, '13calculation.php'
 	, '14excel5.php'
 	, '15datavalidation.php'