diff --git a/calendar/inc/class.calendar_datasource.inc.php b/calendar/inc/class.calendar_datasource.inc.php
index 40ddcd45be..1aee607115 100644
--- a/calendar/inc/class.calendar_datasource.inc.php
+++ b/calendar/inc/class.calendar_datasource.inc.php
@@ -92,10 +92,7 @@ class calendar_datasource extends datasource
 
 			if (!is_array($this->pm_config))
 			{
-				$c =& CreateObject('phpgwapi.config','projectmanager');
-				$c->read_repository();
-				$this->pm_config = $c->config_data;
-				unset($c);
+				$this->pm_config = Api\Config::read('projectmanager');
 				if (!$this->pm_config['hours_per_workday']) $this->pm_config['hours_per_workday'] = 8;
 			}
 			$ds['pe_planned_time'] -= $nights * 60 * (24 - $this->pm_config['hours_per_workday']);
diff --git a/calendar/inc/class.calendar_merge.inc.php b/calendar/inc/class.calendar_merge.inc.php
index 41c5349845..a0a3d4426e 100644
--- a/calendar/inc/class.calendar_merge.inc.php
+++ b/calendar/inc/class.calendar_merge.inc.php
@@ -577,7 +577,7 @@ class calendar_merge extends Api\Storage\Merge
 				$replacements = $this->contact_replacements(substr($participant,1),'');
 				break;
 			case 'r':
-				if (is_null(self::$resources)) self::$resources = CreateObject('resources.resources_bo');
+				if (is_null(self::$resources)) self::$resources = new resources_bo();
 				if (($resource = self::$resources->read(substr($participant,1))))
 				{
 					foreach($resource as $name => $value)
diff --git a/calendar/inc/class.calendar_uiforms.inc.php b/calendar/inc/class.calendar_uiforms.inc.php
index 49a7feebef..3c8ccd289d 100644
--- a/calendar/inc/class.calendar_uiforms.inc.php
+++ b/calendar/inc/class.calendar_uiforms.inc.php
@@ -372,7 +372,7 @@ class calendar_uiforms extends calendar_ui
 								{
 									continue;
 								}
-								
+
 								// email or rfc822 addresse (eg. "Ralf Becker <ralf@domain.com>")
 								$email = array();
 								if(preg_match('/^(.*<)?([a-z0-9_.-]+@[a-z0-9_.-]{5,})>?$/i',$participant,$email))
@@ -483,7 +483,7 @@ class calendar_uiforms extends calendar_ui
 									{
 										// Update main window
 										$client_updated = $this->update_client($event['id'], $content['edit_single']);
-										
+
 										// refreshing the calendar-view with the changed participant-status
 										if($event['recur_type'] != MCAL_RECUR_NONE)
 										{
@@ -766,7 +766,7 @@ class calendar_uiforms extends calendar_ui
 								calendar_so::split_status($status,$q,$r);
 								if ($uid[0] != 'c' && $uid[0] != 'e' && $uid != $this->bo->user && $status != 'U')
 								{
-									$preferences = new Preferences($uid);
+									$preferences = new Api\Preferences($uid);
 									$part_prefs = $preferences->read_repository();
 									switch ($part_prefs['calendar']['reset_stati'])
 									{
@@ -1028,7 +1028,7 @@ class calendar_uiforms extends calendar_ui
 			}
 			else
 			{
-				Framework::refresh_opener($msg, 'calendar', 
+				Framework::refresh_opener($msg, 'calendar',
 					$event['id'] . ($content['edit_single'] ? ':' . (int)$content['edit_single'] : '' ),
 					$button == 'save' && $client_updated ? ($content['id'] ? $update_type : 'add') : 'delete'
 				);
@@ -2490,7 +2490,7 @@ class calendar_uiforms extends calendar_ui
 		$etpl = new etemplate_new('calendar.export');
 		$etpl->exec('calendar.calendar_uiforms.export',$content);
     }
-	
+
 	/**
 	 * Edit category ACL (admin only)
 	 *
@@ -2773,7 +2773,7 @@ class calendar_uiforms extends calendar_ui
 			calendar_so::split_status($status,$q,$r);
 			if ($uid[0] != 'c' && $uid[0] != 'e' && $uid != $this->bo->user && $status != 'U')
 			{
-				$preferences = new Preferenes($uid);
+				$preferences = new Api\Preferenes($uid);
 				$part_prefs = $preferences->read_repository();
 				switch ($part_prefs['calendar']['reset_stati'])
 				{
@@ -2847,7 +2847,7 @@ class calendar_uiforms extends calendar_ui
 		{
 			$d = new Api\DateTime($date, Api\DateTime::$user_timezone);
 		}
-		
+
 		// If we have a recuring event for a particular day, make an exception
 		if ($event['recur_type'] != MCAL_RECUR_NONE && $date)
 		{