Hi @ferdinand , Thanks a lot, that's exactly what I was looking for ! flags: c4d.BaseContainer = c4d.BaseContainer() flags[c4d.FILENAME_DIRECTORY] = True # Add a CUSTOMGUI_FILENAME with our flags settings. self.AddCustomGui(id=MyDialog.ID_FILENAME, pluginid=c4d.CUSTOMGUI_FILENAME, name="Path", flags=c4d.BFH_SCALEFIT, minw=0, minh=0, customdata=flags)