"root_uid" => Array (
			"exclude" => 1,		
			"label" => "LLL:EXT:mh_branchenbuch/locallang_db.xml:tx_mhbranchenbuch_kategorien.root_uid",		
      'config' => Array (
				'type' => 'select',
				'form_type' => 'user',
				'userFunc' => 'tx_mhbranchenbuch_treeview->displayCategoryTree',
				'treeView' => 1,
				'treeName' => 'txchtreeviewexample',
        'treeMaxDepth' => 999,
				'size' => 10,
				'selectedListStyle' => 'width:150px',
				'minitems' => 0,
				[b]'maxitems' => 2,[/b]
				'foreign_table' => 'tx_mhbranchenbuch_kategorien',
				[ ... BLA ... ]
						'script' => 'wizard_list.php',
					),
				),
      ),
		),