wpf click on datagrid to open tab

http://social.msdn.microsoft.com/Forums/eu/wpf/thread/2d78530a-5cdb-4b75-b118-435857da6e7c

http://support.microsoft.com/kb/326442/en-us

e.Handled= true, If setting, set to true if the event is to be marked handled; otherwise false. If reading this value, true indicates that either a class handler, or some instance handler along the route, has already marked this event handled. false.indicates that no such handler has marked the event handled.The default value is false.