When you show an OpenDialog the files are ordered when there is no filter defined and not ordered when there is a filter defined. I tried to find the cause of this but sofar without succes. Is this a Lazarus bug? First: Opendialog without a filter: (http://willemstein.net/images/OpenWithout.jpg) and then the OpenDialog with a filter: (http://willemstein.net/images/OpenWith.jpg)